Vassili :
There are different potential reasons :
- you run a pirated copy of Civ3, wether a rip or a direct CD-copy. If you patch it, it will update the security, and your previous crack to bypass it is obsolete. You should buy a honest copy, it avoids many headaches.
- you run a localized (i.e anything but American) copy of Civ3, and have taken a patch for the US version. Take a patch which is in accordance with your version, uninstall the game, then re-install it and apply the correct patch. It doesn't work the other way around too (for example, if you have the US version but have taken the UK patch)
- you run Civ3 normal, and have taken the latest PtW (Play the World) patch. It can not work.
Could you please be more specific about the patch you installed ? It might help us to find the source of the problem