Is anyone experiencing the same crashes in RED ALERT 3 like me?

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Well this s wat happened.Some 2 weeks back i bought "Red alert 3" .It comes after months of hard wait and follows the much hyped and famous command and conquer 3.The game was nice.Had quicker video loads n enhanced game play etc.But the PROBLEM is that whenever i finish a mission the game crashes and comes out...i mean the first 5 missions were smooth and this started happening after the sixth mission.Okay it pissed me off...i switched from playing as the russians to playing as the chinese...here again after 4 th mission,5 th mission crashes out...same case with allies...i m sure my graphics card is up to the mark...So is any1 else experiencing the same problems like i do?or is mine an unique case?any suggestions or ways to overcome this problem guys?