Problems with Devi Ever Soda Meiser

[slowdive]

Hey guys, I'm having trouble with my Soda Meiser build. I got the Torns Peaker and Soda Meiser kits from Devi Ever. The Torns Peaker went together quite well with no problems, but I'm having an interesting problem with my Soda Meiser: I'm getting a high pitch squeal almost like feedback coming from it. The weird part is I am getting it even when the pedal is switched off (albeit, not as loud). I'm using a Dunlop power supply for testing. I've tried the power supply with other pedals and have not gotten the squeal. Any idea of what could cause this? Thanks in advance!

[Seven64]

try a battery.  my power supply causes some pedals to squeal and others to not.