hi, I not real good with gadgets I just want to play , but I'm trying to use my axe fx 3 with guitar in front and I connected keys to rear input 3 , I can see the input 3 LED light on axe fx 3 when I play keys but no sound, in the fractal edit my guitar works well on input 1 , [I don't know how to screen shot] - amp- cab- del - rev-out1. then for keys I put on input 3 - amp - cab - output3 ? no keyboard sound but if I link the line across to the guitar amp the keyboard works but very distorted , do I need to activate input/output 3 somewhere as signal is working no sound from keys