Throwing an exception while implementing oauth2

I am trying to implement Oauth2 into a spring hibernate project on Eclipse STS 3.6.2. During deployment faced an exception. Project source code is here . What might be the problem? Regards

spring-config.xml:

    <beans xmlns="http://ift.tt/GArMu6"
           xmlns:mvc="http://ift.tt/1bHqwjR"
           xmlns:context="http://ift.tt/GArMu7"
           xmlns:xsi="http://ift.tt/ra1lAU"
           xmlns:tx="http://ift.tt/OGfeU2"
           xmlns:security="http://ift.tt/1c8inpe"
           xsi:schemaLocation="
            http://ift.tt/GArMu6
            http://ift.tt/1jdM0fG
            http://ift.tt/1bHqwjR
            http://ift.tt/1fmimld
            http://ift.tt/GArMu7
            http://ift.tt/1jdLYo7
            http://ift.tt/OGfeU2
            http://ift.tt/18tm2Tg
            http://ift.tt/1c8inpe
            http://ift.tt/18sW2ay">

        <context:component-scan base-package="com.structure"/>
        <context:component-scan base-package="com.trafficalarm.core.services.impl"/>
        <context:component-scan base-package="com.trafficalarm.rest.filter"/>
        <context:component-scan base-package="com.trafficalarm.rest.configuration"/>
        <context:component-scan base-package="com.trafficalarm.rest.resource"/>
        <context:component-scan base-package="com.trafficalarm.rest.api.user"/>
        <context:component-scan base-package="com.trafficalarm.rest.mvc"/>
        <context:component-scan base-package="com.trafficalarm.core.repositories.jpa"/>

        <tx:annotation-driven/>

        <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

            <property name="driverClassName" value="com.mysql.jdbc.Driver" />
            <property name="url" value="jdbc:mysql://localhost:3306/test" />
            <property name="username" value="root" />
            <property name="password" value=""/>
        </bean>
            <!--bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"-->
            <!--property name="username" value="sa"/-->
            <!--property name="password" value="sa"/-->
            <!--property name="url" value="jdbc:h2:mem:test"/-->
            <!--property name="driverClassName" value="org.h2.Driver"/-->
            <!--/bean-->


        <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <property name="jpaVendorAdapter">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
            </property>
            <property name="jpaProperties">
                <map>
                    <entry key="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/><!-- remove when working with mem db-->
                    <entry key="hibernate.hbm2ddl.auto" value="update"/>
                    <entry key="hibernate.show_sql" value="true"/>
                </map>
            </property>
            <property name="packagesToScan" value="com.trafficalarm.core.model.entities"/>
        </bean>

        <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"/>

        <bean id="propertyPlaceholderConfigurer"
            class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
            <property name="location"  value="WEB-INF/classes/properties/app-production.properties"/>
        </bean>

        <!--mvc:resources mapping="/app/**" location="/app/build/"/>

        <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/jsp/"/>
            <property name="suffix" value=".jsp"/>
        </bean>

        <security:global-method-security pre-post-annotations="enabled">
            <security:protect-pointcut expression="execution(* com.trafficalarm.rest.mvc.*.*(..))"
                                       access="ROLE_DUMMY"/>
        </security:global-method-security> -->

        <mvc:annotation-driven />
        <mvc:default-servlet-handler/>
        <import resource="security/security-configuration.xml"/>
        <import resource="security/authentication-managers.xml"/>
        <import resource="security/endpoint-configuration.xml"/>
        <import resource="oauth/oauth2-configuration.xml"/>
        <import resource="oauth/token-store.xml"/>
        <import resource="oauth/client-details.xml"/>
    </beans>

oauth2-configuration.xml:

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://ift.tt/GArMu6"
       xmlns:xsi="http://ift.tt/ra1lAU"
       xmlns:oauth="http://ift.tt/1bBHntb"
       xmlns:sec="http://ift.tt/1c8inpe"

       xsi:schemaLocation="http://ift.tt/GArMu6
                      http://ift.tt/1jdM0fG
                      http://ift.tt/1bBHntb
                      http://ift.tt/1npXF0a
                      http://ift.tt/1c8inpe
                      http://ift.tt/18sW2ay">


    <oauth:authorization-server client-details-service-ref="client-details-service" token-services-ref="tokenServices">
        <oauth:refresh-token/>
        <oauth:password/>
    </oauth:authorization-server>

    <oauth:resource-server id="resourceServerFilter" token-services-ref="tokenServices"/>

    <bean id="clientCredentialsTokenEndpointFilter"
          class="org.springframework.security.oauth2.provider.client.ClientCredentialsTokenEndpointFilter">
        <property name="authenticationManager" ref="clientAuthenticationManager"/>
    </bean>

    <bean id="clientAuthenticationEntryPoint"
          class="org.springframework.security.oauth2.provider.error.OAuth2AuthenticationEntryPoint">
        <property name="typeName" value="Basic"/>
    </bean>

    <bean id="oauthAuthenticationEntryPoint"
          class="org.springframework.security.oauth2.provider.error.OAuth2AuthenticationEntryPoint">
        <property name="realmName" value="test"/>
    </bean>

    <bean id="oauthAccessDeniedHandler"
          class="org.springframework.security.oauth2.provider.error.OAuth2AccessDeniedHandler"/>


    <bean id="tokenServices" class="org.springframework.security.oauth2.provider.token.DefaultTokenServices">
        <property name="tokenStore" ref="tokenStore"/>
        <property name="supportRefreshToken" value="true"/>
        <property name="clientDetailsService" ref="client-details-service"/>
    </bean>

    <bean id="corsFilter" class="com.trafficalarm.rest.filter.spring.SpringCrossOriginResourceSharingFilter"/>

    <bean id="oauthRestEntryPoint" class="com.trafficalarm.rest.security.OAuthRestEntryPoint"/>

    <!-- The token endpoint See org.springframework.security.oauth2.provider.endpoint.TokenEndpoint-->
    <http pattern="/oauth/token" create-session="stateless" authentication-manager-ref="clientAuthenticationManager"
          xmlns="http://ift.tt/1c8inpe">
        <anonymous enabled="false"/>
        <http-basic entry-point-ref="oauthRestEntryPoint" />
        <access-denied-handler ref="oauthAccessDeniedHandler"/>
        <custom-filter ref="corsFilter" after="LAST"/>
    </http>


</beans>

And here is the exception that is occured:

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.security.oauth2.provider.token.DefaultTokenServices com.trafficalarm.rest.configuration.UserConfiguration.tokenServices; nested exception is java.lang.IllegalArgumentException: Can not set org.springframework.security.oauth2.provider.token.DefaultTokenServices field com.trafficalarm.rest.configuration.UserConfiguration.tokenServices to com.sun.proxy.$Proxy67
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4760)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5184)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:724)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:700)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:714)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:581)
    at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1686)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.security.oauth2.provider.token.DefaultTokenServices com.trafficalarm.rest.configuration.UserConfiguration.tokenServices; nested exception is java.lang.IllegalArgumentException: Can not set org.springframework.security.oauth2.provider.token.DefaultTokenServices field com.trafficalarm.rest.configuration.UserConfiguration.tokenServices to com.sun.proxy.$Proxy67
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 26 more
Caused by: java.lang.IllegalArgumentException: Can not set org.springframework.security.oauth2.provider.token.DefaultTokenServices field com.trafficalarm.rest.configuration.UserConfiguration.tokenServices to com.sun.proxy.$Proxy67
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
    at java.lang.reflect.Field.set(Unknown Source)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:504)
    ... 28 more