I am having problems with the game.

[Tros]

As soon as I click multiplayer, it goes into the loading screen, and it crashes with the message that the game has stopped working.

No, I do not have mods and have not changed the game files at all.

 

[MaHuD]

After crashing, what does it say in rgl_log.txt ?

Mine is located here: C:\Program Files (x86)\Steam\SteamApps\common\MountBlade Warband