One of my projects = crash

I have a big problem with one of my Ardour projects. Everything was going well until I changed my USB audio interface. With my new interface, Ardour crashes every time i try to play or export the project. I’ve tried disconnecting all the references to the old interface but with out any luck.
All of my other projects run with out any problems what so ever with the new interface.

I don’t get any error messages in the log window when i open the project

Any suggestions?

suggestion #1: provide version information.