Start new remote backup

I did a Win 2008 r2 remote backup to a shared external HD, on an XP machine, for a number of years and then had to get rid of the XP machine because of lack of Microsoft support. I set up the new remote BU on a new Win 7 machine now for I am getting an error "Volumes larger that 2 Tb cannot be protected". I tried to set it up to a 1 Tb external HD but continue to get the same error message when I try and schedule a remote BU. Is there someway to delete the old remote BU and start fresh besides using the cmd prompt. I have googled this and see no easy solution.