SOLIDWORKS Design & Help

I have been practising with Animations and Motion study but I keep running in to an issue with belts not moving with the animation.

When I am in Solid works the animation or motion study works perfectly and the belts move with the animation perfectly as I designed, however when I export the Animation or Motion study to solid works Visualise or Fusion360 and try to run the animation the belts simply refuse to move with the rest of the animation. The belts stay fixed in their original position and refuse to move. Picture Below !

I have tried changing the belts from float to fix in the original assembly but it does not help.

I designed my complete model by making each section as a separate assembly and then joining these assembly's together as a final design. I am not sure if this is where my problem is. It is very confusing because the animation works perfectly in solid works.

Has anyone experienced this issue ?

Does anyone know why this is happening ?

Any advice for solving this issue ?

Many thanks regards Jason

Animation when transferred to Visualise or Fusion 360

Animation in Solidworks works fine as show below