I have a 2004 XLT, 4x4 with what appears to be the Audiophile Premium, 6 CD, separate subwoofer system. I recently developed a problem with the volume control. When I attempt to turn the volume DOWN using the control knob, the volume INCREASES. Attempts to further decrease cause the volume to increase even more. I can hit the mute buttton, then attempt to reduce the volume, and it usually goes down. Short of an exorcism, does any one have any ideas or recommendations for fixing this problem?