[flexcoders] Data grid column sizing is changing when returning from another state

[stephen_anson]

Hi,
I have a data grid that has several columns, when i go from one state and back 
to the original state the first 2 columns are resizing to fill the grid.
I have used an the following custom checkbox component as an item renderer in 
several of the fields, could there be a problem with this?

<s:MXDataGridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"; 
                                                  
xmlns:s="library://ns.adobe.com/flex/spark" 
                                                  
xmlns:mx="library://ns.adobe.com/flex/mx" 
                                                  focusEnabled="true" 
                                                 >
        <s:CheckBox id="lblData" horizontalCenter="0" 
selected="{dataGridListData.label=='1'}" />
</s:MXDataGridItemRenderer>

when i stick a trace in the enterstate handler it says the first datacolumn is 
-1 in width.
any help much appreciated

cheers Steve