[flexcoders] GroupingCollection

[jovialrandor]

I am trying to get unique values of an arraycollection by using 
Grouping Collection, but my Combobox below does not come up with 
anything:

<mx:GroupingCollection id="jobsGroup" source="{people}">

        <mx:grouping>

            <mx:Grouping>

                <mx:GroupingField name="job"/>

            </mx:Grouping>

        </mx:grouping>

    </mx:GroupingCollection>

    

    <mx:HierarchicalCollectionView id="jobsHC" source="{jobsGroup}"/>

 

 

 

    <mx:ComboBox id="jobsComboBox"

        dataProvider="{jobsHC}" labelField="GroupLabel"

        x="258" y="33" 

        width="232"/>

    <mx:List id="jobsList"

        dataProvider="{jobsHC}" labelField="GroupLabel"

        x="258" y="63" 

        width="232" 

        height="105"/>


Thanks