Audition 1.5 and Firepod Question

[Silverwulf]

OK guys, maybe someone here can provide some insight for me. I'm currently using Audition 1.5, and I have a Presonus Firepod. I'm using an Alto HPA-6 Headphone Power Amp with the units for headphone access.

I have the CUE outs plugged into the stereo inputs in on the back of the Alto. When recording, I set my Input on the track in Audition to which mic pre I want to record, and everything works fine. I can track just fine, and I can hear everything I'm tracking into my headphones. However, upon playback, I'm not getting anything into the headphones. I've went in a set the Output on the channels to play back through every device I have available, and there's no no sound for playback through the headphones. It plays back through my speakers just fine, but for some reason, it's not feeding the signal back to my Firepod/Headphone amp.

Any suggestions on what the issue could be here? Thanks!