Refresh Grid

Hi everyone,

I'm trying to filter data in Grid based on querybuildrange then refresh it when combo box's selection change.

I have found a lot of solution ( http://kashperuk.blogspot.de/2010/03/tutorial-reread-refresh-research.html ), but nothing works in my case; I have tried Ds_reread, Ds_refresh ect...i have tried to reload the form too but the grid still not refreshed.

Any Help please?

Thanks.