So I recentely purchased a Crybaby Wah Classic (very happy with it by the way) and the only other effect I have is a Boss MT-2. Whenever I play each pedal seperately the work fine, but when they are both in use and connected to eachother the sound randomly goes out. It could be the middle cable connecting the two pedals but im not sure. Thanks for the help.
Go to a music shop and ask them to test teh cables. also ones batteries could be dead?
Epiphone Elitist Les Paul Custom WCR and Dimarzio equipped
Marshall 2266 Vintage Modern
Marshall 1960TV
Dunlop Crybaby From Hell
Have you tried them in a different order?
"Breathe, breathe in the air
Don't be afraid to care"

Fender Strat/Tokai LS80>few pedals>Orange Rocker 30