No probs, many thanks for your help. I'll get a look to this two files.
In fact, the problem seems to be link with the gun use by the player. It's this one that is missing and not two as I said before.
I've tried to open the mission of the MOD under the builder to see how you've built it but I've a CTD when I want to charge it.
some shots with 1910 version and its white cabin