Selection Issues with Custom Model

[Hawkwing]

I have a model that for some reason won't highlight when I hover my cursor over it and it can only be selected with a marquee selection (left-clicking without dragging does not work). What I want is for the health bar and selection circle to appear around the model when I hover the mouse over top of it.

I've tried recalculating the model's extents, going through each geoset and making sure "unselectable" was ticked off, and messing with the materials because the setup is kind of weird. What else should I try messing around with?

I've attached an image showing my problem. The last third of the image shows that the health bar is in the correct location when I get it to appear through other means.

 

[UgoUgo]

Have you tried messing with collision shapes?

 

[Hawkwing]

Have you tried messing with collision shapes?

Aaaand that worked! Interesting. I already had two collision spheres. I removed them both and recreated one and that fixed the problem. Thank you very much!