slipping belt problem on AA S/C

[Furious]

hey guys i recently installed an AA rotrex supercharger but ive run into a problem with the belt slipping, making the worst noise too. we replaced the belt that came with the kit within a week, and we used a new type of belt off the shelf which was ok at first than started to slip the next day. i have Craig at AA looking into it, but i wanted to ask some of the guys on here if they have encountered this problem before and what you possibly did to resolve it?

thanks guys...