Make sure you reupload the map images with the main server shutdown. once you upload start the main back up and restart any expansions you have. Expansion will still hold old configuration until restarted.
As this is my first time doing this (sorry for asking if there's a FAQ on this): How do I get a hold of the map images? I'm currently running the official 2x2 sample map and from what I see I don't have the file stored locally.
Should I access the FTP and download it from there and then reupload it?