empire total war cannot be played

Hi,

I downloaded empire total war. When I push the PLAY button, for a while it seems to be loading. I see the prompt STARTING, and the PLAY button turns to CANCEL, and a little later it turns to STOP. But before seeing anything about the game, it crashes. The PLAY button returns to PLAY, and everything is just as the beginning.

Can anyone help me? How will I start this game?