Datagrid SelectedIndexChanged Does Not Fire

[Brad]

I have a web project that uses a datagrid. If I include the datagrid
directly on the page, then all of the events in the codebehind for the
datagrid fire correctly. If I move all of my code to a User Control, the
ItemCreated and PreRender events for the datagrid fire correctly, but the
SelectedIndexChanged event never fires. Does anyone know why this event
does not fire when the datagrid is used in a User Control?

Thanks,
Brad