Gambit geometry problem

cestrin

I'm using AUTODESK Inventor to create a business jet and simulate it using Fluent. I have loaded my design into Gambit and am now running into a small problem. The outside part of the cylinder which represents the engine are not showing up. I don't know if the problem is occuring in Gambit or in my Inventor model. Also, I have a second smaller cylinder inside of the engine to represent the turbines. This area is being covered by the front and back of the same cylinder I am having problems with above. If anyone has run into this problem and gotten around it please let me know how you fixed it. Thanks.

- Chase