DataServiceQuery BeginExecute timeout sql

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Silverlight4

RIA

Hi.
I am uisng SIlvelight 4, and RIA Services, so I am calling some store procedures with SL2005. the Store procedures all working successfull. except one of them, because it is taking a lot of time. I have an error regarding to timetout.
This SP do a lot of instructions When I try it in SQL Enterprise manager, it takes until 2 minutes.

How I can modify the time out for this Store procedure callings.


the call has smothing like that:

serviceQuery.BeginExecute(new AsyncCallback(OnStoreProcedureComplete_OnLoadComplete), serviceQuery);

In the methos:

OnStoreProcedureComplete_OnLoadComplete

I have an error regarding to time out.

Could someone help with this issue?.
Thank you very much