Flex mobile list won't scroll vertically
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In flex 4.6, mobile project, i have a list component with a custom itemRenderer. My problem is that the list won't scroll on vertical. Can you tell me what i'm doing wrong.
Here is the code :

    <s:List left="0" right="0" top="0" dataProvider="{DataModel.instance.listaRestaurante}" 
    itemRenderer="itemRenderers.restauranteRender" width="320" horizontalScrollPolicy="off"      verticalScrollPolicy="on">
    <s:layout>
    <s:VerticalLayout gap="10" requestedRowCount="-1" useVirtualLayout="true" />		
    </s:layout>
    </s:List>

Thank you