touch with car stereo

[9tr3g]

i am using my touch to play music in my car. i am running wm6.1 and tf2d. i connect it to my aux port with a 3.5mm cord. my problem is that it only plays through the right speakers. i have tried to pull up audio booster but all it says is to plug in a headset. does any one have any ideas on how to fix this?

by the way i am using wmp and the tf2d player.