Spring Security role define

when i am trying to authenticate by giving username name as "sumit1" and password as "123" it is redirecting me to the login error page, though i have defined the same role as i have defined for username "sumit" .

this is my spring-security xml file.

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://ift.tt/GArMu6"
     xmlns:xsi="http://ift.tt/ra1lAU"
        xmlns:security="http://ift.tt/1c8inpe"
     xsi:schemaLocation="http://ift.tt/GArMu6 
          http://ift.tt/QEDs1e
       http://ift.tt/1c8inpe 
       http://ift.tt/1epvZ6L">

     <!-- This is where we configure Spring-Security  -->
     <security:http auto-config="true" access-denied-page="/sumit/auth/denied.jsp" >


      <security:intercept-url pattern="/admin**" access="ROLE_ADMIN"/>
      <security:intercept-url pattern="/user**" access="ROLE_USER"/>
      <security:form-login authentication-failure-url="/sumit/auth/invalid.jsp"/>


      <!-- <security:form-login login-page="/sumit/auth/login.jsp"/> -->

      <security:logout logout-success-url="/index.jsp"/>

     </security:http>

     <!-- Declare an authentication-manager to use a custom userDetailsService -->
     <security:authentication-manager>
             <security:authentication-provider>
               <security:user-service><security:user name="sumit" password="123" authorities="ROLE_ADMIN"/></security:user-service>
               <security:user-service><security:user name="sumit1" password="123" authorities="ROLE_ADMIN"/></security:user-service>
             </security:authentication-provider>
     </security:authentication-manager>

     <!-- Use a Md5 encoder since the user's passwords are stored as Md5 in the database -->
     <bean class="org.springframework.security.authentication.encoding.Md5PasswordEncoder" id="passwordEncoder"/>

      <!-- An in-memory list of users. No need to access an external database layer.
          See Spring Security 3.1 Reference 5.2.1 In-Memory Authentication -->
      <!-- john's password is admin, while jane;s password is user  -->


    </beans>