Follow-up action is not displayed

The follow-up action is not getting displayed.
Firstly created a plugin project, and added a extension point IOperationParticipant.
The Plugin.xml file is as below.

<plugin>
   <extension
         point="com.ibm.team.process.service.operationParticipants">
      <operationParticipant
            class="rtc_extension_plugin.CheckSummaryParticipant"
            id="rtc_extension_plugin.operationParticipant1"
            name="Check Summary Participant"
            operationId="com.ibm.team.workitem.operation.workItemSave">
         <extensionService
               componentId="rtc_extension_plugin.extensionService1"
               implementationClass="rtc_extension_plugin.CheckSummaryParticipant">
            <prerequisites>

                <requiredService
                interface="com.ibm.team.workitem.service.IWorkItemServer"/>
                <requiredService
                interface="com.ibm.team.build.internal.common.ITeamBuildService"/>
                <requiredService
                interface="com.ibm.team.build.internal.common.ITeamBuildRequestService"/>

            </prerequisites>
         </extensionService>
      </operationParticipant>
   </extension>

</plugin>

After restarting the server, the follow-up actions is not displayed.

The reference article for OperationAdvisor is working fine. Same proceedure is used to create the OperationParticipant.
https://www.ibm.com/developerworks/mydeveloperworks/blogs/extendingrtc/?lang=en

Please help.