[captainpeter]

So you're saying that the obj I exported from your ac file works but you can not replicate it on your computer?

Could you try the following:
Open your 'cockpitinn13.ac' file and then choose 'Update Workspace from old plugin' in the x-plane menu of AC3D. Then save the ac file.

Now try again. (I did this for good measure before exporting the obj since I noticed an early 2010 modification date of the ac file).

let me know....

cheers
Peter