add reviewer/add approver for n-level workflow not working...

Hi, We are using SRM 3.0/EBP 4.0 system and are using the "N-level approval of shopping cart" workflow. We recently upgraded to support pack 11. Before the upgrade we were able to add approvers and reviewers. However after implementing the support pack , when we are trying to add a approver or a reviewer , we are getting the error " NO POSSIBLE PROCESSOR FOUND FOR APPROVAL TASK. INFORM SYSTEM ADMIN"

Please help me figure this out .

Sincerely,

Isaac