Alright, so I just made the switch from a PC to a Mac. I've used my GX many many times on my old PC but it doesn't seem to be working on my iMac. I have all the recent drivers, monkey, all that jazz. I tried different USB ports, different guitars, different cables, and the GX is selected in the Output and Input in System Preferences. Still no sound. In Pod Farm the little level meter in the top right corner stays black. Tried GarageBand and nothing there. It's like the GX isn't picking up my guitar or something. I've tried everything I can think of. Can anyone help?

iMac Specs:

2.66 GHz Intel Core 2 Duo

2 GB 1067 MHz DDR3

Mac OS X Leopard 10.5.8