Softimage Xsi: Need help: How to make a drive belt

I'm trying to make a sort of rubber belt that connects along the two "gears". Basically an engine and shaft, in other words.


I tried to do it the way shown above by extruding the square curve along the path, but that turns out really really weird.


What should I do?


EDIT: Nevermind, I got it to work. I now have my beautiful drivebelt!! :D