If you are worried about something. Here is a little FAQ:
Solution: GMPhysics 5 cant use this type of processors: Intel Celeron, AMD Athlon 2500+ and etc, AMD Duron, AMD Sempron 2500+. We know, that the newest processors doesnt have any problem. Sorry.
Solution: Please make sure that you have following hardware configuration: CPU 1.6 GHz, 512 MB RAM, 64 MB video memory, Direct-X 9.0c or higher, PhysX system, Windows XP or Vista.
Solution: This is one of the most bad errors with the physical model. We recommend to restart the game.
Možné řešení: Bug in the DLL of the game. Just restart game, please.
Solution: You have not installed PhysX engine correctly. Try to install it from here. When will be errors also after instalation, download complete PhysX engine from: http://www.nvidia.com/object/physx_8.06.12_whql.html
Solution: Check if you are connected to the internet and if yes, the only thing why score wasn't sent is that your firewall blocks flip-flap access to the internet.
Solution: Your internet provident hasn't ISP identificator, which choose which flag will be displeyed. We are sorry.
Solution: You can set up Fullscreen pressing F4 key in the game.