At the offical site they suggest this:
http://www.matrixgames.com/games/store.asp?gid=342
Code:
We're Sorry. The requested product is not available for purchase at your location.
(Error Number: 30029909 - 0)
Btw near the error message there's a phone number:
http://www.digitalriver.com/dr/v2/ec_Main....&CACHE_ID=0
Did you try it?