Thanks for ur reply.. it worked.. but another issue came..

In my report i have 8 parameters.. and 3 are passed from code (from codebehind), and the rest 5 parameters will accept input from user.. but these 5 parameters depends on the role of the logged in user.. depending on the role 3- 4 parameter will get values from the user input.. the remaing 1-2 parameters will be passed with default(dummy) vaues. these are multi valued parameters...

but while running the report i am geting error " ABC" Parameter missing a value ..

Thanks in advance .........

Pls help...