Hi

No, all options are turned off. I'm using the 7.5 Extra Edition from Sybex wich was updated to 7.82 by the patch from the conitec site.

As I said: The Demo Version of Gamestudio worked very well. I can oben Levels wich were build with the Demo and all sprites work just fine. But when I try to modify the old Level with my new sprites and the full version of Gamestudio, they are simply not shown.

Very confusing...

But I don't think it could be Windows 7 Pro x64 that causes this problem. GED shows my Sprites, but GED crashes very often. It's a matter of luck starting GED on my system.
What Version do you use? Have you downloaded it from this Website or did you buy it in a shop?