Logitech headphones NOT WORKING!

Hello all

I'm in another country for the summer, so I really need to video chat back home. Of course, my Mac's built-in microphone broke the day before I left. I bought a Logitech headset that was working GREAT for two weeks.

Today, I plugged it in and the microphone still works fine but now the headphones won't work. It's like the computer detects the headset, because when I go to System Preferences it lets me select Logitech USB headset under my input options, but it WILL NOT give me the headset options for output. What gives?

My laptop is a Mac OS X version 10.4.11

Included is a screenshot of my Audio Midi Setup (note how it tells me "Output is not supported" for the headset, which of course makes no sense because it was working FINE yesterday) PLEASE Help