Custom Vehicle Problems

[TEMPTii]

I created a vehicle tag like the covenant supply crates and the uplink in TM Immolate except its a human crate. So first I imported the gbxmodel into max, where i made the jms file. Then I created the physics and model_animation files with the jms\jma files and it loads into sapien without error. When I actually place it onto the map, sapien crashes. What did I do wrong? The vehicle file basically has all the same attributes as that from Immolate (aside from the model directories) but it still doesn't work.

EDIT: Got it after searching, it was the physics that was the problem.