Moving vBulletin to a new Server / Domain

[InPhaseVB]

Hello, I have been trying to move a v5.1.9 installation from an internal server at my office to a public web server. I moved up the file structure and the restored the database then changed the config.php file in core/includes to point to the new database but when I go to the new site it just redirects all traffic back to the old. I have tried going to the administrator login /admincp/index.php but it just gives a 404 error so I cant change the bburl setting which some posts say is the solution. I have looked in the database and found in the settings table bburl, frontendurl & frontendurl_login
which have the internal server's address but even changing these does not fix the issue. Is their something I am missing? Also as an aside I have noticed that one of the files it is trying to connect to css.php in the root web directory does not exist but works on my internal install is this some sort of routing? Any assistance would be greatly appreciated