Well, today my new amp arrived, but somehow, the reverb just doesn't work... it's a Crate gt1200h head with a 412SL cabinet (though I don't think the cab would make much of a difference). I've tried with and without using footswitch, turning it all the way up, using all 3 channels, but it just won't work. Can you guys help me out, or this just a manufactering flaw?

Cheers, Erik