Hi,
Many thanks for that, they are working now ?
I don't know how this happened but I backed up my rig manager to a H/D and when I went back to the amp there was no sound.After hours of internet searching I found the output was off.Like I said I've no idea what I did to mess up but now the output is set at master mono and all seems well so hopefully the gig will not be as stressful tonight.
cheers Jac 
