How to use "OnDataSourceChanged" Event?

[fomur]

Hi, 

Is anyone know how to use "OnDataSourceChanged" event of GridFX? I have tried it but it warned me like this :"No overload for 'UpdateGrid' matches delegate 'System.EventHandler'". I have tried  I have looked around API notes to find out an example yet failed to do so. My sample code is below. Thanks for any help.

Code at aspx file:

 <GridFX:Grid ID="Grid1" runat="server" DataSourceID="AccessDataSource1"   Motif="Hotmail" Palette="Hotmail" Width="900px" OnDataSourceChanged="UpdateGrid">   //Details...

</GridFX:Grid>

 Code at aspx.cs file (I have put all the options I have tried so treat each of them as only method that is written):

 1) protected void UpdateGrid()   {   }

  2)protected void UpdateGrid(object sender, EventHandler e )   {   }