[flexcoders] Checkbox in dataGrid

[markgoldin_2000]

Here is my DG:
<mx:DataGrid width="140" id="planversions">
                    <mx:columns>
                        <mx:DataGridColumn headerText="Time" 
dataField="planversion"/>
                        <mx:DataGridColumn headerText="Plan" 
dataField="isplan" rendererIsEditor="true">
                            <mx:itemRenderer>
                                <mx:Component>
                                    <mx:CheckBox/>
                                
</mx:Component>                        
                            </mx:itemRenderer>
                        </mx:DataGridColumn>
                    </mx:columns>            
                </mx:DataGrid>

and data sample:
<planversions>
  <planversion>11:51:02</planversion>
  <isplan>true</isplan>
</planversions>
<planversions>

Chckbox does not show true values. What am I missing?

Thanks