I'm a little lost on high end audio. I am trying to run MP3's from the pc to my pioneer VSX-AX4AVi receiver. I cannot figure out the audio connection to the reciever using the Creative Xfi sound card (cannot get any audio input recognition on the reciever), but can get sound when I use the USB connection on the reciever. WHat am I missing? I have ensured the sound hardware on the pc for the creative is enabled, and have tried optical and standard audio cales but the input is not recognised. Do I need a product to sit between the two? help!