InfoPath Dev

i am using sharepoint 3.0 and infopath 2007, when i try to place form in sharepoint i get an error "infopath cannot create a ne, blank form. The form contains schema validation errors"

under show details i have "The element 'comment' is used but not declared in the DTD/Schema." i looked up data and even deleted totally from my sql database i deleted it from my form and saved the form and republished. i still get this error even though comment is no longer part of my form. the only thing that i can think of is that the form is opening up an older version but i don't know why or how

Exisitng forms are dependent on the template they were created from.

If the template is changed, fields removed or renamed the exisitng XML no longer is compatible with the template.

You need to add comment back in and just leave it in the form, even if it is not in the view to preserve backward compatibility.

 I have put comment but it will show my:comment and still not working. Any idea?