[flexcoders] itemRollOver and itemDoubleClick not firing on datagrid

[dave_defusion]

I can't figure out why this isn't working, I thought I was missing
something silly on Monday so didn't look at it all day yesterday in
the hope that a fresh view would show me the issue but I really can't
see what's going on.

Here's what I have:

<mx:Script>
<![CDATA[       
        
        import mx.events.ListEvent;
        
        private function doRollOver( event:ListEvent ):void
        {
                trace( 'ROLL' );
        }
        
        private function doClick( event:ListEvent ):void
        {
                trace( 'CLICK' );
        }
        
        private function doDoubleClick( event:ListEvent ):void
        {
                trace( 'DOUBLE CLICK' );
        }
]]>
</mx:Script>

...

<mx:DataGrid id="tasksGrid" width="100%" height="100%"
dataProvider="{tasksData}" itemRollOver="doRollOver(event);"
itemClick="doClick(event);" itemDoubleClick="doDoubleClick(event);">
...
</mx:DataGrid>

I'm compiling with Flex 2.0.1 and the only think that I can get to
fire in the above example is the itemClick event.

I have tried adding the listeners via actionscript (within the
creation complete) but that makes no difference. I'm really not sure
why this isn't working.

Any suggestions are greatly appreciated.