Ok so I recently bought a stereo system for my dorm, I've been able to hook it up to my television, but I'm having some difficulties hooking it up to my computer. I'm using an RCA to Sound card connection, with a minijack that connects to the sound card. However I am not finding the right jack on my computer for my sound card. Currently I have five jacks on my sound card, Line In, Mic In, L Out, F Out, CEN/SUB. I've tried the L out and the F out, but I've had no luck, can anyone help??