I have jaguar and just bought a mic for my agp g4 400mhz tower. I pluged it in the mic port on the back but under the sound pane when i try to test the mic, the bar that indicates the level of sound the bar doesnt move. I have it all the way up and still nothing. Under the external pane it does come up that i have a external mic and let me select that option but no sound. Please i hope you can help me.