I have a 2009 mac mini (2.26 C2Duo) and im trying to use Skype BUT i have it connected to my LED TV set. There is a mini jack cable going from the minis headphone port to the TV's RCA input ports. I can perfectly hear the person talking to me from Skype, but the its seems that the minis mic doesn't work and he cannot hear me talking. What am i doing wrong? Any ideas?