I have created a stone window sill profile with several different sizes. I loaded this family into a window family, created a sweep, and used one of the sill profile types as the sweep profile. Now when I click on that sweep and look at its properties, there is a property for the profile family type, but there is no = box next to it. I tried creating a Family Type : Profiles parameter in the window family, and it shows the sill profiles loaded into the window family, but it doesn't affect that window sill sweep when I change it, because the sweep still isn't associated with that parameter.
What am I missing here?