I had this guy rigged to Dante and had loads of problems just like that when he 'died'(he didn't fully die, you could still shoot him and blood would appear.)

But what I did do was-
1. Re-download the fixed version from 'My Products' circa March 28,2011 fix.
2. I imported the updated model into Fragmotion, deleted the model and texture and saved it as a .ugh (Fragmotions native file).
3. Then Cleared it.Imported my model already rigged.
4.Deleted the animation file
5.Merged the .ugh file I previously created which replaced the bones and added the new animation file.
6. Exported as a .x at 24 frames /second. and now he dies properly.
I don't know if it was a model thing or a script thing fixed but it works well now. Hope that helped.
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