Hi Kathy,
Thank you for being patient.
The issue with -
'Controls could not be added to GenericDropdown dynamically' has been confirmed as a defect and our Developers are working on fixing this issue. The fix for this issue is expected to be available on June 26th 2008 and we will get back to you on the specified date with more details.
Please refer to the following link for the status update on this defect fix.
http://www.syncfusion.com/support/issues/tools/Default.aspx?ToDo=view&questId=10560Please let us know if you have any other concerns.
Regards,
Melba