[flexcoders] AdvancedDataGrid doesn't update with real data?

[markflex2007]

Hi,

I am working with cairngorm with Flex 3.

I use Datagrid before in the page and it works fine.The Datagrid
automatically update when the data updated in database.

...
<mx:DataGrid x="15" y="72" width="581.5" height="239"
dataProvider="{ModelLocator.QModel}">
                                                                                
<mx:columns>
                                                                                
<mx:DataGridColumn headerText="Name" dataField="Name"/>
                                                                                
<mx:DataGridColumn headerText="Department"
dataField="Department"/>                                                        
                                 
                                                                                
</mx:columns>
</mx:DataGrid> 
...

I just use AdvancedDataGrid to raplace DataGrid and add grouping
feature.But it has a problem now.


<mx:AdvancedDataGrid  x="15" y="72" width="581.5" height="239"   
         rowCount="4"  initialize="gc1.refresh();"   >

<mx:dataProvider>                                                   
                                                            
<mx:GroupingCollection id="gc1" source="{ModelLocator.QModel}">
                                                                 <mx:grouping>
                                                                   <mx:Grouping>
                                                                           
<mx:GroupingField name="TypeName" />
                                                                   
</mx:Grouping>
                                                                   
</mx:grouping> 
                                                            
</mx:GroupingCollection>                             
                                                         
                                                         </mx:dataProvider>     
 
                                                         
                                                        
                                                        
<mx:columns>
                                                        
<mx:AdvancedDataGridColumn headerText="Name"
dataField="Name"/>
                                                                
<mx:AdvancedDataGridColumn headerText="Department"
dataField="Department"/>
                                                                 
</mx:columns>
</mx:AdvancedDataGrid>  


The problem is the AdvancedDataGrid doesn't update even if data
updated in database when I visit the page again.

Please give me a idea how to fix this.why this happen

Thanks for your help

Mark