Help me for playing!

[Epiphany]

I wanna ask you a dumb question . RAM of your pc ?

[ThatOneGuy]

Do you have the newest .NET Framework installed?
The newest is .NET Framework 4, which can be downloaded for free here

Also, try deleting your config.xml, found in your FGunZ folder.

If all fails, try disabling DEP, by following this tutorial.