Stereo Out but Only hear Mono in Playack

Just installed C7 and my US-366 on my laptop which is devoted entirely to recording.

When I open my old projects, or record a new project, and play them, all I hear in my headphones and monitors is Mono output.

I am set up for stereo out, the Mix Console shows Stereo out, with it’s meter showing stereo separation levels…

US366 is the default audio device, Vista SP2, 32 bit, 3Gb ram, dual core 2.17 Ghz, I am using Steinberg power scheme with ASIO guard disabled (This greatly reduced my Average Performance Load)

Any assistance would be appreciated, thanks.