Delete the Dreamweaver Cache file from the users configuration folder:
if you still have problems after deleting the cache file, What version of Universal Email are you using?
Please send a copy of your page that you are trying to apply UE to in a zip archive so i can see if there is code on the page creating the problem.
Where your problem is not the same as the OP's, it would be best for you to start your own thread.
What version of Universal Email are you using?
Create a new blank PHP page and save that to your site, do you get the same error if you try to add universal email to the blank page?