This bug doesnt happen to me nor any people I play with, I can only assume you have patched the game either using bad sequence of patches or wrong patches. I also assume you have non steam version of the game of course.
Only thing I can tell you is to register the game on steam using gamespy cd key and let steam redownload it and update it for you assuming you have no problem using steam. If not then you should uninstall entire game and delete stuff under my documents\my games\mowas as well. Then install the game(what version of the game you have and where did u purchase it?) First you must patch to 2.5.13 by getting proper patch:
For normal non GOTY version:
http://www.1cfiles.com/MoWAS_patch/m...05.13-full.zip
For GOTY version:
http://www.1cfiles.com/MoWAS_patch/m...en-2.05.13.zip
AFTER you patched to 2.5.13 then you must also patch to 2.5.14 based on whether your version is GOTY or non GOTY:
http://forum.1cpublishing.eu/showthread.php?t=34336
Again there been many weird various versions flying of the game so manual patching can be a problem sometimes, best solution would be to try to register game with steam.