Bex Prompts are asking before execution of query in Webi

Hi all,

              I am using Bex queries(SAP BW 7.3 SP 11) as source and i psam creating Webi reports in SAP BO. And Promts are asking before execution of query. And how i have to pass prompts in Xcelsius level andi am using BIWS on top of Webi and Passing Values through Qwaas Conn.