No perfect mode in Windows 7

[Realplayer]

Hi Folks, i successfully installed IL-2 1946 under Windows 7 using a.exe and patched the game to 4.08 and then 4.09.

Then i tried to enable hardwareshaders=1 in the conf.ini to enable the perfect landscape mode. OpenGL and stencil buffers are activated.

But ... perfect mode is not available and after ending the game the setting of hardwareshaders change automatically back to 0 again in conf.ini! Also the settings water and effects change back to 1 in the conf.ini!

Any help please?!