Firewire Solo 1470 Problems, No sound Options

[delphi]

Hi, I'm really new at this, but I have an iMac G5 with which I run Garageband 2 on. I have an M-Audio Firewire Solo, and I run the sound through my headphones, or I would, if there was sound at all. I have downloaded the drivers for it and installed them. i have gone through all the troubleshooting techniques described in the garageband manual. I really don't know what to do. I have a crappy USB microphone that I used to record a demo, but I can't really control the gain on it so the sound peaks a lot. I would love some feedback and help. I'm also going to call Applecare. Thanks!