'Save Work Item' operation cannot be completed

Hello,

I have written an extension to "com.ibm.team.repository.service.asynchronousTask" to modify work items and save at some intervals.

I am getting the below Exception while saving work item with “approve” work flow when the user is not ADMIN (server default user).

com.ibm.team.process.common.advice.TeamOperationCanceledException: CRJAZ6053E The 'Save Work Item' operation cannot be completed. Permission is required to complete the operation. For more details, open the help system and search for CRJAZ6053E.

Here is the scenario:

1)      If I use a non-admin user id (which has Permissions) I get the error while saving the work item. But same user can save work item from WebUI.

<configurationProperty
                accessPolicy="OPEN"
                default="myadmin"
                description="User"
                displayableName="User"
                name="task.runAsUser"
                required="true"
                type="STRING"
                updatePolicy="NO_RESTART_REQUIRED">
</configurationProperty>

2) If I use ADMIN user, save work item works fine.
<configurationProperty
                accessPolicy="OPEN"
                default="ADMIN"
                description="User"
                displayableName="User"
                name="task.runAsUser"
                required="true"
                type="STRING"
                updatePolicy="NO_RESTART_REQUIRED">
</configurationProperty>

Could you please help me in this regard.