Try restarting the Office program you are trying to connect to.
If that doesn't help, try restarting your computer.
If the problem persists, check out this FAQ article: http://www.tntware.com/tntmpd/faqs/en/how-do-i-get-past-quot-interface-not-supported-there-is-some-problem-with-the-way-office-is-installed-on-your-machine-quot.aspx