It seems something is freazing your thread. I guess proccessing the data on the clients side is a slow operation and it freezes your UI. I would suggest you to use BackgroundWorker to proccess the data at the client's side. You can find an example with RadBusyIndicator and BackgroundWorker into our online examples here
. It is the RadBusyIndicator's FirstLook example.
the Telerik team
Sharpen your .NET Ninja skills
! Attend Q1 webinar week and get a chance to win a license! Book your seat now >>