Hey Bam users, I just picked up a 2003 model, and when I plugged in directly (bass to amp), I get nothing. Am I doing something wrong? I have played with the volume and gain, tried switching cabinets, moved the input trim to various levels, and still I get nothing. My cable is fine as well and I don't use an active bass. The manual does not give any trouble shooting ideas. Does the footswitch have to be attached for the combo to work? Thanks for your input.