Well I got the unit today, the problem is I can't get guitar only sound. I've got the GK cable hooked into the GK input on the GR-20 and the guitar out plugged into the amp. No sound at all, period from any of the 3 modes. So i plugged the cable into the output right mono and plugged that into the amp and now I get Synth mode, Mix mode but still no Guitar mode. Anyone know what I'm doing wrong. This is the second unit now and the same problem with both units. The manual seems very unclear with no trouble shooting guide. Any help would be greatly appreciated!
