Logitech Headset To Ps3

Problems with PS3 Headset?

I have a Logitech Headset for my PS3 and i have been trying to hook it up for a looong time but with no luck.
I have the Input as Logitech Headset and the Output as System Default
I know this is right because i read it online a lot.
I also heard that you're suppose to hold down L3 and that still doesn't work for me
Also, i tried using my Guitar Hero Microphone and that doesn't work either (i switched the settings each time)
I know that Mic works because i play Guitar Hero with it and it works fine.
I also tried using my dad's Bluetooth headset and that doesn't work either. And that works on his phone too.
So, obviously, i'm doing something wrong.
PLEASE HELP!!
What am i doing wrong?!?! I tried playing it in games but it just doesn't make a sound. But, it works in the Accessory settings. I have the Game Chat ON in the game too.
Thanks : )

you have install it i forget how

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