Deadringer v1. Gain Pot

[karter2000]

Hi all,

I have a v1 Deadringer, and I'm about ready to go insane.  The Gain pot appears to have no affect whatsoever, but the boost does when switched in.  I've checked, and checked, and double checked everything over for the last three days, and I can't find anything wrong.  I've audio probed and took voltages and everything.

Also, I'm using the revised wiring diagram that Brian posted a while back.

Help.