Can't delete web part

I have custom user controls each with a SQLDatasource and a GridView in a DeclarativeCatalogPart.  When I try to delete a control from a WebPartZone I get the following error.
The SqlDataSource control 'SDSOnCall' does not have a naming container.  Ensure that the control is added to the page before calling DataBind. Can anyone help me figure out why this is happening?
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