Stop Refreshing of SSRS Report on the Selection of values from Drop Down List

Hi All,
I am trying To Stop Refreshing of SSRS Report on the Selection of values from Drop Down List.There are 10 Drop Down List and selection of any one it is getting refresh each time and very slow and a hectic process.I Want to refresh report after the complete selection of filtered values from the Drop Down List and then click on View Report ButtonWould appreciate if some one can come out with a solution for the issue or is there any option in SQL Server 2005 from refreshig after every drop down selection.
Thank You In Advanced..Kali Charan Tripathi
INDIAMail ID -- tripathi_soft@yahoo.co.in
-- kalicharan.tripathi@in.schneider-electric.com