Logitech USB Headset 250 - No Mic.

I posted some time back about my audio being "splitted", forcing me to select full balance left or right to hear everything. I have replaced that headset with a usb one, which is working great, except I can't get the mic to work. There doesn't appear to be a switch for it, and it is the selected recording device. It is not muted, and the volume is maxed. The only problem I can find is that a USB HID device and USB composite device are supposed to be installed by Windows, however it only installed the audio device. Does anyone know how I can forcibly install those 2 devices?

EDIT: Here is the fix: Spend the extra ten bucks to get the 350 headset. I returned the 250, got the 350, and it works perfect.

Jam it back in, in the dark.