This is a strange problem. I have two multimedia headsets (headphones with microphones)one microphone works on my computer but the other does not, yet the that does not work on my computer works on other computers,I have tried allsorts of thing to make it work but without success. If any one can help I'd be eternally greatfull
Compare the length of the Jack Plugs and check you own socket.
It used to be a regular problem with HiFi systems. Someone may have inserted a slightly longer Jack and moved the end contact for it no longer to make contact on one of the sets. Even a millimeter air gap is sufficient to muck you up.
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