I also have no such problems, must be something in your end. Try what cybereality
suggested, and be aware that if you use 64-bit OS, you will have two services (Win32 and Win64), stop them both
. If you don't want them to start with windows, just set their "Startup type" to Manual. You'll have to manually start them both every time you want to play in 3D, before starting the iZ3D Control Center.
Oh, and try updating your graphics card drivers, and also install the latest DirectX (from June).