[theresbuzz]

Hey,

you need to provide a few points of reference otherwise it´s hard to pinpoint your problem.
First check the hardware make sure you have everything plugged into your system.
Second check in Pro Tools under Setup-->Hardware if your soundcard is recognised correctly.
Third check the playback engine in the setup menu.
Fourth check in the mixer on which output you are sending your audio and recheck that in you I/O setup, if this output corresponds to the correct outputs on the soundcard.

Hope it makes some sense.