Hey,
I've read around and lots of people seem to be having the same issue. It's not the "I don't have a levels folder" issue. I have that.
THe problem is that when I export my sketchup model, it doesn't create a .cfg file which is what actually goes into cryengine. I've done some testing, looked at last years forums, and the issue seems to be that Cryengine can't handle my model. However, I have checked vertices in sketchup and it comes up as "Total Number of Vertices: 19332. If you export this geometry as a single model, it should export properly as it is under the 65536 vertex limit the supported game engine requires."
So, according to cryengine there is no problem, yet timey wimey stuff happens.
Cheers
Andy