That should go in the C&C section
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To answer your question (longer):
Your windows probably doesn't display file extensions (as it is by default).
If you activated that (somewhere in the explorer options), you'll see that there's a Civilization4.ini, and a Civilization4.ini.bak (=backup).
You've been editing all the time the .ini.bak, because due to your settings you saw it as .ini, because the .bak was hidden. You didn't see the real .ini, because the .ini extension was hidden as well. So you believed you edited the .ini, but you were editing the .ini.bak, which was restored to the original .ini settings after every start (it's the backup of the .ini, so every start: ini.bak = .ini).
-> you need to edit the right file.
Hope that helps you
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