I am using SolidWorks 2009 to model a system that has three pulleys. Their faces are coplanar, and their bores are colinear. The middle pulley has a larger outer diameter than the other two. When I try to add a belt to this assembly with the Belt/Chain tool, I can only get the belt to wrap around one side of the middle pulley; the other side of the belt takes a straight-line path between the outside pulleys, which causes the belt to pass through the profile of the middle pulley. I've tried reordering the belt members, I've tried selecting different combinations of edges and faces, I've tried flipping the belt, and I just can't get it to wrap the way it would realistically. This seems like a pretty simple application of the tool, so I must be doing something wrong. Can anyone provide some suggestions? Thank you in advance.