Reply to S4 Audio help and button help!

hey there i just got the s4 about 2 hours ago and ive been trying to sort out the sound issues. i cant seem to get sound to come out of my headphones and speakers at the same time. i have speakers connected to my pcs onboard audio and headphones into the S4. also allot of the left sides buttons arent working at all.. the load buttons and the samples and the cue buttons are not working at all. the jogwheel and fx and everything else works fine but not the others. please help me someone