Critical issue at webi level, unable to fix past two days now

Hi friends.

When i schedule the Webi report , and when i refresh webi report  i am getting below error

"

10901: Database error: [Microsoft][ODBC SQL Server Driver][SQL

Server]Statement(s) could not be prepared.. Contact your Business Objects

administrator or database supplier for more information. (Error: WIS 10901)"

I checked the universe connection,ODBC connection both are working fine,

Report has 5 objects and 2 conditions

Without conditions report working fine

with First condition (created case statement at univerese designer) report working fine

With second condition (prompt created at UDT) report giving that error, i checked the prompt sytntax at udt ,parse is ok

Could you please help me ,how to solve this issue, i should have  sent this report to user two day back but i still i am not able to fix this issue

Thanks

Chinna