Help!

Can someone help me please. I have a 98 accord lx 4dr and a stock audio system. Everytime i play my CD player, the speaker on drivers side and the speakers in the back suddenly goes blank. What I mean is that it doesnt have any music coming out, only the passenger side has music coming out. I'm a newbie at this and I find Hondastyle very helpful and havent let me down. And no I cant take it to my local honda dealer to fix it because Its used, and no my 3 year warranty doesnt cover "audio system". And yes, it only happens when i play the cd player, sounds find when i play the radio. Thanks in advance