I have the same problem w/ rebirth. I have to take out the direct connect i/o out of my extension folder, and switch the outputs, out of mac into power amp. This totally sux, i have e-mail steinberg USA, which handles the service for REBIRTH stateside. They are working on it. I have posted a question on this forum addressed to a tech and have heard nothing. BTW before starting PTLE, you must put back the DCI/O in extension folder or you WILL crash! I will put a post up when i hear from steinberg. peace sdf