Time slows down and pitch follows

I work in both in windows (mainly for VST) and mac (for audio recording). When I move my project in these two platforms the time slows down and the pitch follows. I noticed that when don´t have my ASIO M-Audio fast track pro in my mac the problem is the same. What I would like to know is where does my problem resides, because project sample rate is the same as my ASIO.
Thanks for any reply,

erm…tempo perhaps?

If your project speeds up and pitch follows, it´s a samplertate issue, unless you changed tempo track and transpoe at the same time.