I have a pair of pc-150s that I got with my new comp, now I used them when I first booted up my new system and they were fine, now I have a problem with mic reception, its very very quite when I speak into it, I have reinstalled drivers for my onboard sound (Asus A8V mobo) to no avail, this occured after a friend of mine fixed an echoing problem I was having (everything I heard was routed to the mic line. All cables look fine, can anyone help?