selectindexchanged event doesn't fire after I cahnge my datasource

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I had a datasource that was an ODBC for MySql. I have switched it to be a
MySql Native .Net datasource. I have a dropdownlist control that uses this
datasource. Both populate the control just fine but when a value is selected
from the control the selectedindexchanged event is not fired when using the
native driver.

The Page_Load event is fired but it always returns a value of 0 for the
selected item anyway.

Also, this is happening in an Ajax UpdatePanel. If it isn't in a panel it
works fine also. In the Panel I have even set the contol and event to be one
of the triggers and still no help.

Any ideas?

thanks.