My Buddy Guy Signature Wah finally came in the mail today and I can't get it to work.
Supposedly the blue led should show that it's on, but I only get my normal sound without the effect.

Anyone know what I could be doing wrong/ how to properly use a wah?

I really don't want the hassle of returning this and I'd like to get it working, any advice would be tremendously appreciated.
Press down on it hard or press the little button kinda thing with your finger that is under the pedal. It turns it on/off.
My Gear:
Epiphone Les Paul Standard
Peavey Vypyr 30
DW Collector's 3 pc drums
Mapex Black panther snare
Sabian AAX/Zildjian K cymbals.