out of sync (CD:0)

[[SOE]No.Mam]

both games must be same. i never used any trainers, but when you use a trainer and your brother dont use same trainer you will get a "Out of synch error". ervery game with LAN/Internet works only when both players have exact the same game (files/filesize/mods/trainers...) otherwise you will get a "Out of synch error". that is the protection from MoW against "cheating".

[KnightFandragon]

The best bet to fix that issue is to have one of you totally delete the mod and then one of you send the mod from your mod folder to the other person that way you both know for a fact you both have the same mod.

[SpeedWolf]

The error that you are having is from the trainer. trainer are use for singleplayer not multiplayer or LAN as far as i know.