Issues generating existing curb and gutter

I am working on placing the existing curb and gutter in my existing features file, and I have run into a snag. I am not able to get the 3D Existing Curb Feature to work. I can place the linear template, and I see a corridor generated in the plan view, but nothing happens in the 3D view. I have followed the steps outlined in the related webinar and in the FDOT Roadway Design and 3D Modeling handbook, but when I try to set the Feature Definition to "Pavement Existing," nothing happens. I am able to click through the dialog and I don't get any errors, but the line style doesn't change. I'm not sure if this is causing the problem, but it's another issue I noticed during this process.

Any idea why this would be happening?

Thanks!