are those folder being used by your seedbox?
"You can be mad as a mad dog at the way things went; you can swear and curse the fates, but when it comes to the end, you have to let go"Benjamen button
if it's a linux seedbox, the best would be to login as root in putty to do your move in a shell window, you'll have all the permissions on the files you need to move
i have the some problem!
mv /filename ../new-destination/
mv /root/Tom.Cruise.Pack.RTS ../root/My.New.Huge.Folder/
Maybe... I'm not that good =)