I'm at the stage to start the constructor. I've added everything to the funnel. Gotten the coal. But when I turn the flywheel Wilbur says "We have the coal... and we all need now is a v-belt to connect the steam engine to the flywheel. My problem is that I have already attached the v-belt. And I went on a walkthrough to find a solution if I had forgotten something but I can't find anything.
Do you know any solution to this issue?