Solved: Back sound port not working

ok well i posted on another thread about my USB problem but i also have a sound problem i dont get what it is but whenever i hook up my speakers in the back they arent recognized my the system i had to rig them xD and im using another front panel to channel sound through... ah oh yes when i try to hook up the audio wire into my motherboard right when i cut the power on it gives me a high squealing noise and it wont turn on i figured id buy a sound card but i wanted to make sure if im doing anything wrong and dont waste money

SOLVED: like a retard i didnt have onboard audio set to auto in the BIOS i changed and it worked