How to map videotexture on xfile

i got a question concerning videotexture mapping
I have an xfile which consist of 2 rectangles (built in cinema4d / 2 side walls of a cube) which i want to video texture.
i connected video texture to the texture pin gouraudirectional.
now one rectangle is textured perfectly / but one the second one i only got colored stripes. I ve been reading through all kind of helpfiles but i still can not figure out how to display the video on both rectangles.
thanks a lot for your help in advance!

Hi probably you have a wrong UV mapping. Fix that on Cinema4D

thanks for ur fast reply.