Besides moving all the files of the WB installation I assume you changed the Admin Path and URL as well ... so they should look like this:
If this is the case, it should work perfectly. I never had problems doing exactly this ... If you don't find another solution, you might take a backup of your installation and the DB. Then you make a new installation of WB and upload the files and DB again ... but no warranty on that one.
Are you shure, that the folders have the required permissions set (write for WWW-User)?