subassembly doesn't rotate

Hi guys,

I'm new on this forum! and i need a little help please:

I designed a simple shaft with a wheel on it. After saving it as anassembly, the wheel is still able to rotate around the shaft.

When is insert the assembly into another assembly, the wheel seemsnot to be able to rotate anymore. (Everything is floating, and onlythe shaft is mated to another part.

Does anyone know how to rotate the wheel? I always have thisproblem when inserting an assembly into another one.

Thanks!!

Abel

SolidworksMotion Studies