The query cannot run because it contains incompaitable objects WIS 00008

Hi

We recently migrated from 3.1 to 4.1. Some of our reports on Web Intelligence are not working.  I got the error "The query cannot run because it contains incompaitable objects WIS 00008" while all the variables parsed at universe level. I have enabled both the options Multiple SQL statements for each context & Multiple SQL statements for each Measures in Universe Parameter Window. But still i am getting the same error. Can any one resolve this??

Thanks

Anil