how to receive list of directories or file from ftp server with int-ftp:outbound-gateway?

i defined ftp adapter to connect ftp server , but i see ftp server log and see not request send to ftp server , my adapter code is :

<bean id="ftpClientFactory" class="org.springframework.integration.ftp.session.DefaultFtpSessionFactory">
        <property name="host" value="127.0.0.1"/>
        <property name="port" value="21"/>
        <property name="username" value="banks_reader"/>
        <property name="password" value="123456"/>
        <property name="clientMode" value="2"/>
        <property name="fileType" value="2"/>

    </bean>


    <int:channel id="inbound1">
        <int:queue/>
    </int:channel>
    <int:channel id="outbound"/>
    <int-ftp:outbound-gateway id="gateway1"
                              session-factory="ftpClientFactory"
                              request-channel="inbound1"
                              reply-channel="outbound"
                              reply-timeout="777"
                              auto-create-local-directory="false"
                              auto-startup="true"
                              filename-pattern="*"
                              remote-file-separator="/"
                              command="ls"
                              command-options="-1 -f"
                              expression="payload"
                              order="1"
                              mput-regex=".*">
        <int:poller fixed-delay="1000"/>
    </int-ftp:outbound-gateway>

and show

DEBUG PollingConsumer:208 - Received no Message during the poll, returning 'false' in application log