Ui, this should be sticky post!
@Jumperjack: I saw it, when lookin on your cards performance. There I saw, that it runs nearly half as fast at it could (600mhz instead of 1200mhz). And yould clearly see, that the is not detected as a game, but as a video!
I searched the internet and found the reason, which was also stated here in the meantime. Poor, that this is still a problem.... Shame on that, as this is no task for a money earning company to solve it...