by Colin Fraser.
mmm check the config.php file, make sure the current ip address is the one showing, same with the address to the moodledata folder as well. Also, in the address bar of your brwoser enter :
http://[your.moodle.address]/admin/replace.php
When the page shows, enter the old url and replace it with the new url. This allows you to automatically scan the database, and moodledata folder to replace the old url string. It should be showing something then.