need help with usb sound card

i got the sound blaster mp3+ external usb sound card. i installed all the drivers and it doesn't work, the sound doesn't go to my car stereo. any suggestions as to why this is happening? by the way i have a few hours to get this done and pack my stuff cause i'm driving to orlando for school tomorrow morning. thanks for your help.

turn the volum up. Also did you disable any onboard sound? Check your hardware tab, any conflicts? yellow checkmarks?

turned the volume up. didn't disable onboard sound card. i'll check that out now. thanks, i'll tell u what happens in a few.

thanks, got it to work.