i have a 512mb MMC and i got plenty of mp3 on it. i use the HS-3 headset to listen to my mp3 but recently the right earphone doesn't work(no sound) while the left one is ok. the other day i connected my HS-2R to my 6630 and after that i connected my HS-3 and it began playning normally, ie with stereo sound(both earphone working). however after some time when i reconnect my HS-3 only the left side works, so wat could be the problem?? plz help me coz i use my 6630 as mp3 player