Hmmm, I'm not able to reproduce the problem.
Can you provide some details on your system so I can try recreating the problem in a similar environment:
What is you OS?
What Version of Dreamweaver?
What version of validation Toolkit? Or are you using Form Builder?
If your using Form Builder:
Did you have Validation Toolkit in stalled before installing form builder?
Did you uninstall validation toolkit before installing form builder?