RadGrid custom aggregate footer column stops grid binding

[Phil]

Hi:
I have RadGrid with a calculated column with custom aggregate footer.

<telerik:GridCalculatedColumn HeaderText="Total" UniqueName="PriceExtendedColumn"
    HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right" FooterStyle-HorizontalAlign="Right"
    DataFields="Quantity, Price"
    DataType="System.Decimal" Aggregate="Custom" FooterText=" ">
</telerik:GridCalculatedColumn>

I am getting a blank screen.

Phil

[Phil]

Hi
Got it.

<telerik:GridCalculatedColumn HeaderText="Total" UniqueName="PriceExtendedColumn"
    HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right"
    FooterStyle-HorizontalAlign="Right"
    DataFields="Quantity, Price" Expression="{0}*{1}" DataFormatString="{0:N2}"
    DataType="System.Decimal" Aggregate="Custom" FooterText=" " />

It was going to Page_Error.
Phil
Note: the FooterText is the html whitespace & nbsp ;