Hi Narasimhan
Have you looked at: http://scn.sap.com/message/14017868 or http://scn.sap.com/thread/3297617
it is not marked as resolved, however, we have given solution if you are on SP10
1) Implement note: 1736533 (there is a post-note SE11 step to perform)
Then next two steps were necessary for me to delete cache as it broke critical roles and profiles
2) Execute report: POWL_D04 and delete the admin query cache of
all the 3 POWL admin queries currently having trouble
3) Execute report: POWL_D01 and delete user queries corresponding to
the above admin queries, initially do this for one test user