Checkboxes not saving state

Hi,

I have a datagrid whose datasource is a datatable which is saved to
viewstate on page_load.

I also have a cached string which handles what is shown on the
rowfilter of the dataview of this datatable.

I also have a cached string that holds the way the dataview is sorted.

Now, on my original datagrid i have a row of checkboxes added from the
property builder. The HTML behind it is : <asp:CheckBox id="chkPrice"
runat="server" AutoPostBack="true"
OnCheckedChanged="chkPrice_CheckChanged" EnableViewState="True">

As you can see when clicked, the method 'chkPrice_CheckChanged' is
meant to be called. However i dont think it is being called. I know i
it doesnt hit my breakpoint when i put one in.

The chkPrice_CheckChanged is meant to save all the checkbox values to a
hashtable so on the next page_load, the checkboxes can be filled again.

Does anyone know why this method isnt called, and/or provide some light
to the situation.

Thanks,
Arun