Why can't I add a second Revolute Joint for my Gear Joint?

The title says it all. I tried making two revolute joints and then selecting them on the gear joint window, and I tried selecting gear joint and creating two revolute joints from that window, but they both didn't work.

You can see the product on the attachment file.

2 Answers

Take a look at my cursor in the "Revolute Joint 2" attachment.

I think the Gear Shaft Parts are unnecessary. I would delete both instances, and draw them as part of the fixed Base.

Then add both Revolute joints between the Gear and the Base.

Don't forget the Gear joint.