SWAT 4 help

goldbug32

I played the SWAT 4 demo and loved it, so I downloaded the game from Direct2Drive. But when I try to play it, all I get is the title screen. Then the hourglass keeps turning and turning, but nothing happens.
I've gone to both Direct2Drive and Sierra for help, and have gotten nothing. I noticed many people in the Sierra forum complained of the same problem, but there weren't any answers.
Anyone have any idea how I can get this game to work?
I realize I don't have the best computer specs for it (ATI Mobility Radeon X600, 1 gig of RAM), but I'm hoping there's still some way to get it to play.
Thanks.