Can anyone help. Here's the setup of my TYROS: Main outs L/R to Channel 3 L/R on my Yamaha MG 8 mixer. Sub 2 output which has R3 assigned to it goes to Channel 5-right. Sub 1 which has Right 2 assigned to it goes to channel 5 - left. R2 has strings, Right 3 has Brass. R2 has Volume pedal assigned to it. R3 has a separate pedal.When I press both pedals down, the strings come out the left and the brass comes out the right. This is a stereo channel and the pan is in the middle. I would think the brass would come out both sides along with the strings on both sides, yet they are acting like a mono channel. Any idea how to correct this?