Hmm
Think I must have gone wrong somewhere...
Backed up the site 2
Deleted the add on domain
Recreated the add on domain the location as /newsite
FTP'd the files from your backup to the newsite
Can get into the admin panel OK and everything is there but
When I type in the site URL all I get is a blank page

Any ideas?
Going to do it all again in case I missed something out