Unable to load ltmsg.dll

Hello I have a Big Problem. I hope you can help me. When I start the game everything seems to be normal. HGW Game Watcher loads normal and you think everything is ok. But suddenly there comes an Error and it says: Unable to load ltmsg.dll. So I tried many things to fix that. I re-installed the game but it didn´t work, I downloaded a new ltmsg.dll file but it didn´t work and I turned off my AntiVir and my Firewall but it still doesn´t work. So now you guys are my last chance to continue playing the game. I am waiting for some awnsers of yourselves