Hi again, it's been more than 9 months since i posted about this issue. Here is what happened: I e-mailed Line-6, they didn't give a damn, so again, i gave it to another repairmen, he also couldn't figure it out and i had to throw my 250 $ into the garbage. BUT, last month, i was going to buy TC electronic flashback delay, i tried it couple of times, i didn't like it, so i saw a used line6 dl4, at first i hesitated and then i said what the hell, i bought the same pedal again :D what can i do? the tones are really incredible, it's working without any problems these days, but we will see...