peavey_xxx_treme
perhaps you have input monitoring disabled during playback? in X2 Edit> Preferences>Playback and Recording> (uncheck) disable input monitoring during playback.. Hope this helps.. =)
Well I want to let you know that you fixed my problem.
After going Windows 8, Sonar X2, and a new interface (US 1800) i wasn't sure where to look.
Sure am thankful for this forum. I just kept looking and my problem is solved.
Thank you!