Workflow Message is not generated in Work Center

hi All,
I am working in JD Edwards Enterprise one 9.O (E9O).In my workflow i am using two action task for approval process.In First approver(55378) i had defined Group Distribution ( defined AN8 and Structure Type )and shortcut i am calling P98806 application.The same way i mapped Second Approver(55386)also.When the workflow is started The Approval process message is properly generated in Work center for first Approver.The Exact issue is the first approver log in that approval form and approve it. but The Second level Approval message is not generated in Second Approver Workcenter. I checked the Process task Monitor for first approver the status is Approved but second Approver the status is Unopened. In distribution list i didnt select any option( first response , High level Override and Authdentication). So anybody has any idea??..please do the need ful ASAP