Voodoo Lab

I am having a big issue right now with the PPAC and a Whammy II pedal. I have a PPAC to power my Rocktron Banshee Talk Box and a Digitech Whammy II. When I plug in the whammy and try and use the wah I get massive hum.

The Banshee does not cause any hum. I don't understand how this is happening.

Any suggestions?

Which wah pedal are you using? Many wah's with an inductor need to be placed as far away as posilbe from the power supply.