Hi, in my game I have a level for the menu an many minigame-level I can choose. When I start the game I can change the resolution in the menu or can switch from window-mode to fullscreen.

Now there is a strange problem. After I once loaded an other level every time I try to change my resolution or switch video mode (back in the menu or via shortcut in the loaded level) it ends up in a hard crash.

W1246 DirectX driver failure: D3DERR_INVALIDCALL.


I have an NVIDEA GeForce 8600 GT video device.

Any ideas?