Getting error: Cannot run the FrontPage Server Extensions on this page When publishing a FrontPage form

I am getting the error:
Cannot run the FrontPage Server Extensions on this page:[page name]
This is a contact form that sends to an email address. I have read numerous posts on this and can't figure out why it's not working. The website is hosted on a server that has many other websites and all their submit forms work fine. I have checked the permissions of the _private directory. I have reinstalled the FrontPage extenstions a few times. I have taken out the save form results to file option and am getting the same message. When I created the form I simply copied it from a page that I know is working and changed the email address of where the results are getting sent. Nothing has fixed the problem.