Multipal value selecting for SP

[msnaidu]

IF i give parameter name in ReportStudio as the stored procedure paramter then will i able to select multipal values from that combo box.

like Query1 will give list of county and Query 2 is the SP with parameter
?Con_Param?
Now when i create a Value Prompt with Query1 with parameter ?Con_Param? ..

IS it possibal to select multipal value with the Value Prompt?? (Value Prompt ,multipal value select is enabled)

I am not able to select the multipal values as its SP parameter its allowing only one value to select at time.

Regards
Meera