I have found the error. My SP2 was a damadged download, so an error was somewhere in my WindowsXP System. Now i have earned my own SP2 CD from Mirosoft, reinstalled SP2 and everything works great. Wow, it´s great to work again with Gamestudio after 2 weeks. For all people who using XP, watch for your updates!! And thanks for JCL, he has brought me to the idea with the update error from Microsoft.