Klinsmann, did you save in any of the following situations:
submerged
near (50km) active traffic
near (50km) a port
in heavy weather
near a ship you just sunk
while being under attack
?
any of those may cause a CTD on loading, especially saving submerged
if not any of the above then please describe the situation, perhaps there's a way to fix a specific problem
Firewall, seen your post, don't know a solution though...