Pot problem

[icecycle66]

I built another Macheen last night. I bought duplicate parts for my first build and didn't need any so i had all the parts left to build another one.

Anyway, everything seems to work fine, but only when the Limit and Volume are all the way up.
When they are maxed out, the Gain and Trim work perfectly, but if either the Limit or Volume pot is anything less than maxed then the pedal goes silent.

I'm going to do simple troubleshooting at home tonight.
I was wondering, while at work, if anybody know why it would do this. So i guess my question is;

Why does the pedal go silent if the Limit or Volume pots are not maxed out?

[midwayfair]

My bet is a small solder trace between two of the pots' pads. I do this every frigging time I build an etch. Backward pots if you didn't use board mounted is another likelihood.