AC settings won't save?

[Cactus]

Hi, I'm trying to help out a clan member who has had some problems with his AC settings after re-downloading on Win7.

Every time I open AC it has lost all my settings and forces me to re-enter the screen rez, sound vol, player name, etc. I just installed it a few days ago and it's driving me insane. Any ideas on how to save the settings would be a huge assist.

Have checked that cfg is writable. Can't seem to save settings!