You don't really give much info but I'll assume you mean you've got your project into CMP rather than Trainz, in which case there are three possibilities that I can think of:
- You haven't put the mesh in the asset's folder.
- The name of the .im file does not match what you have entered into the "mesh" line of the config (what's the name of the .im file in your folder?).
- The .im file is in a subfolder (in which case the "mesh" line in the config should read "foldername\mesh.im") or it's in a different subfolder to what your config file says.
If you post your config and give us a bit more info we'll be able to tell you what's wrong.
JB