Beamng crashes when I load my .Jbeam

Im following the tutorial here: http://www.beamng.com/threads/2728-Tutorial-Creating-your-own-vehicle but when i go to load the jbeam structure in game like the tutorial says, the game crashes to desktop. what is going on?

 

my car crashes when i drive it into a wall. you've probably made a mistake and it implodes on load and restarts the game. No one seems to notice threads in this section though so im afraid an answer will be slow.

 

Make sure your ref nodes are defined. Console will also list the error as it may be a parsing error created by a forgotten or extra bracket, etc.