Some Contols Revert Back to Default Style

I''m having strange issues with a few projects where Syncfusion ComboBoxAdv and DateTimePicker Styles revert back to the Default Style when opening a form in VS2003 designer. A message is displayed in the Task List for each Syncfusion Control: Object type cannot be converted to target type. Not sure how to diagnose this issue. Also, for some projects I have received the following message in the Task List: Code generation for property ''WeekInterior'' failed. Error was: ''value'' Code generation for property ''DaysHeaderInterior'' failed. Error was: ''value'' Presently using version: 4.1, but had the same issue with 3.3. Thanks

Loader.
Up arrow icon