This problem is usually due to an incompatibility between the NoRaze patch and the Steam-version of the
labels.txt file, which was edited to allow MP-games to be run via Steam (the Steam
conquests.exe may also have been adjusted, not sure).
To fix it, go into your
..CivilizationIII/Conquests/Text/ folder, copy the
labels.txt file, paste the copy back into the
../Text folder (you may need to confirm that you want to keep both files; or save the new file under a new name), and rename the copy as e.g. '
labels STEAM.txt'
The open the
labels.txt in any text-editor, and scroll down until you find the lines
"...
Ping
Unknown
Host
..."
And delete the 'Unknown' line:
"...
Ping
Host
..."
Restart Civ3 using the NoRaze patch, and the button labels
should go back to the correct versions. If they don't, well, that's why you made a backup first...