Hi there, nobody any idea?

Hi, i'm having a problem with the Prismrotation in my gdtf file. the lamp i'm working on has just one wheel for prism and prismrotation. so i defined different channel sets for the different functions. in the actual version int the attached pictures i can see the prism in the MA 3D Window but it won't rotate. I've tried a few things but i can't get it to rotate. Can anybody tell me where i go wrong