Plantronics Audio 355 Multimedia Headset microphone not working on Windows 7

[Ashrooms]

I've recently purchased a Plantronics .Audio 355 Multimedia Headset for basic PC gaming. The headphones part works great but the microphone just doesn't work at all. When I input the microphone jack of the headset into my computer, my computer knows its connected but and will say it's available but when I try configuring it by speaking the given sentence, nothing happens, it's as if it wasn't connected. I tried installing Realtek drivers but every time I do, they don't do anything and basically get overrided by"IDT High Definition Audio CODEC" and that's the only one that ever shows up. I've been trying repeatedly and in the whole thing, I must have accidentally deleted something because now the Stereo Mixer isn't showing up and the rear headphone jack has stopped working.
Below are pictures:

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[James Mason]

Are you sure you plugged the microphone jack into the Pink microphone port on your motherboard?
Or did you plug it into the front? if you did, try the ports on the back of the mobo. (blue for speakers/headset, pink for microphone)

 

[Ashrooms]

Are you sure you plugged the microphone jack into the Pink microphone port on your motherboard?
Or did you plug it into the front? if you did, try the ports on the back of the mobo. (blue for speakers/headset, pink for microphone)

Yes, I've tried connecting the microphone jack in both the front and rear pink ports. I have the Pavillion p7-1209 PC if that gives any more information. While trying to figure out the problem, the rear headset port has stopped working now as well. And I know microphones work on this PC because I used to have an old Logitech microphone that would be used for Skype.