Brothers i bought a dvd of red alert 3 from my local store..

the dvd worked installed the game..but there is something wrong with it

the campaign works..but the skirmish does not work.

i really want to play some local skirmish matches with 3-4 bots
but i can't whenever i try to load the skirmish it gives me this error



http://imageshack.us/photo/my-images/546/unledjno.jpg/
please help me guys !!
am i missing the map files or what ??

i really don't want to download the whole game..
help needed urgently !!