belt squeal

[Sandman]

I've been having a squealing belt now for a few months ever since I put this MPS on. Right now I'm running a stock size belt on a 3.6 though I have also run one for a 3.4 to no avail. It pretty much squeals at idle, accelerating, and just cruising. I have the pulley pressed on as far as it will go with the ZZP tool and if I throw on a new belt it won't squeal for a day or two then start back up, I know it's not a pulley or the accessory belt. It's driving me insane since it's so loud and won't go away. Anyone have any tips to get rid of it?

edit:
Damm1t wrong section, mods please move to L67.