Angle Constraint Issue in Inventor

I am using Inventor 2016 to put together a VEX Clawbot as described in the instruction “video 6: Assemble Drive Shaft and Collar” in “4.3 Building a Clawbot” under the link

I am running into the following problem. When I use angle constraint on the collar and drive-shaft, the shaft and collar no longer rotate. Please help.

Please do not make the same post in multiple places on the forum, as it makes it more cluttered. I do not know how to fix your problem, but I’m sure someone does and will help you if you wait.