replay

So when i changed my settings to not save a replay(to try and see if it gives better fps) and then try to change it back it wont work.
Most settings except the video settings. I click "save as" but it just goes back to the way it used to be.
Little bit different with sound. when i change my volume it saves, but the next time i click the wrench it goes back to the way it used to be.
Anyone know a fix.

I do reinstall CF but after a couple of days it goes back to the same thing.