I/O settings changing on its own will.

[MacGreginator]

Hi There.

I'm so to say very new to PT, and have been having some problems with the warning "some outputs or sends have been made inactive". So i started digging on the WWW - only to end up with an additional warning "Some bus paths were made inactive because their mapped output paths are unavailable" - Then i started some more WWW digging and tried tried to understand this thread http://duc.avid.com/showthread.php?t=320998 .. And after several tries to activate, reactivate - tried to default everything -reinstalled protools - threw my PC out the window - made a new session exported the i/o settings only to import them in an old session -Now with the result - that if i make a new session, closes it, opens it - the same error occurs...

error 40 y pls..

Anyone out there with an idea of what to do?