I am having the very very same issue. My Omega works like a charm with all versions of CUBASE, & SONAR and even Logic on my MAC, but with Power Tracks on my HP LAPTOP? Grrrrrrrrrrrrrrrrrrrr, it freezes up my entire system. Now, we have POWER TRACKS VERSION 2010.................so ima go try it now.
Please stay in touch. Let us hope that this scenario can be rectified ASAP because the Omega is a very excellent interface.