Problem with microphone(64 bit vista)

Hi there, i recently bought a Creative Fatal1ty headset that I am trying to setup to use as a microphone to use on ventrilo.

Computer specs:
Vista Premium 64 bit
Creative Lab Sound Blaster X-Fi Xtreme Audio

Got realtek hd audio manager installed also, along with the sound drivers that came with the sound card and the installation cd that came with the microphone. The microphone is a usb.

I can take screenshots of the pictures of sound devices and my ventrilo setup so you guys can help me more. I can hear what people are saying but they cant hear what i am saying.






There is a setting to select Headset(creative usb headset)



Under the output device drop down the choices are:
Default Directsound device, Headset(Creative Usb Headset), Digital Output Device (SPDIF)(Sound Blaster X-Fi Xtreme Audio Vista)

Under the input device drop down the choices are:
Default Directsound device,Headset(Creative Usb Headset), Digital Input Device (SPDIF)(Sound Blaster X-Fi Xtreme Audio Vista)

Under mixer the choices are:
None, Headset(Creative Usb Headset), Digital Output Device (SPDIF)(Sound Blaster X-Fi Xtreme Audio Vista), Digital Input Device (SPDIF)(Sound Blaster X-Fi Xtreme Audio Vista)

I would greatly appreciate if someone could fix this for me