I’m trying to power a Line6 DL4 with the PowerMax. The pedal requires 1200mA of current, so I’m using the 8800 parallel adapter plugged into two 9v outlets on the PowerMax. Connected to that is a type 3 (yellow) standard flex cable, which matches the barrel size and polarity of the DL4. I believe I’m doing everything right, but the pedal won’t power up with this configuration. The pedal does work otherwise, including with batteries, but as soon as I plug the cable from the PowerMax in, it turns off. What could be the problem here?