Up until recently, I hadn't really had a set of monitors to use for editing/mixing, just had been doing everything through headphones. A friend is loaning me his monitors which are Event "Tria". My setup is:
MacBook Pro (2.4 Ghz Non-unibody, 2GB RAM) w/500GB firewire project drive
Ultralite Mk3
MXL 990 on Input 1
Blue 8 Ball on Input 2
Headphones
Main Outs going to Event Tria (sub and two monitors)
Garageband (from iLife 09)
I've got the CuemixFX window open and using that. I have GarageBand's input and output routed through the Ultralite. I'm seeing the Main's Levelmeter moving along with the audio source I'm playing (of course not having mics open while I'm using speakers for playback) and in the headphones I'm hearing exactly what I expect. Is there anything I'm vastly overlooking or should it be routing the sound I expect through the main outs?
If this is not enough info, I would be more than happy to provide more.

thanks in advance!
-Andy