Well, I thought I'd look, using the "helpful" search facility..... The first thing to hit me was it does not recognise the tag "outhorise" ! Then it told me it did not recognise the tag "owner" !! 
Ridiculous - I know there are some posts on authorising to new owner, but can't find 'em...
Hopefully someone else can help.
I would presume you'll need their password etc ....but I don't know for sure.
Check your PM's.