Sort on client side

I`m using sgwtee2.5 with SQLDataSource.

Each time a user try to sort or filter data on a grid, the grid contacts the server,
which is useless because he holds all data already.

Is there a way to tell the grid to sort/filter on client side?

thanks!

You can see that this is not the case in samples (eg Adaptive Sort), so try to figure out how you broke the correct, default behavior.