Windows 7: Headset issue

I have a logitech G330 headset and this headset is connected through my logitech keyboard g110.
The issue right here is that when i open a game like left 4 dead 2, the boost level on headset g330 goes up all the way to max by itself, making the headset impossible to hear. so i have to go manually in control panel/sound/recording tab/mic/ and bring down the boost level myself.
anybody knows whats the issue here?

Dualcore 8500
gtx 285
780i nvidia motherboard

Have you pre-set up the headphones & mic ?? Plus set the volume in both settings. One on the system and one for the headphones ?

i do not know exactly which you talk of

OK. No problem.

Just go to your start menu. Then control panel. >> Then hardware and sounds. >> Then select the sounds and set it to your likings. Also do the same with your actual mic and headphone settings.

Did it come with an installation CD for the headphones and mic of the headphones ?? Meaning does the headphone shave mic attached ??

set it to liking?
and no it didnt come with an installation cd.