Form won't set Summary:Comments field in Drawing

[Anonymous]

Our title block uses a couple iProperty fields to fill information, including the multi-line Comments field. I've written a simple form that allows the user to set the Title, Author, Project Name, etc. and this all works fine. Because Inventor for some reason does not include the Summary:Comments field as a stock input in the form generator, I've made a Rule that sets the Summary:Comments field to user property "DrawingStatus", then added a field in the form that allows the user to set the DrawingStatus field.

Interestingly, this all works in the Part/Assembly environment - I can run the form and am able to set the DrawingStatus field, which correctly filters into Summary:Comments. But when I try to do the same in a DWG file, the Drawing Status input box is greyed out and the label has a line drawn through it. Any idea why the DWG environment would treat this differently? Thanks!

[bradeneuropeArthur]

Could you please upload your code and dwg file.