hmmm, unfortunately I wasn't lucky. I had actually tried the extrude thing before and it didn't work but I really rushed it so I thought I might have done something wrong.
But I get the same results, Attached twist deformer to curve in my extruded surface and, well you see the result in the pictures below:headbang:
Matt, did you do anything else to your object before attaching the nonlinear, like move pivots or grouping?

thanks a lot

F