Originally Posted by StickYY

have you enabled portrait wallpapers? if not, install gconf editor, open X-Terminal

Code:

gconftool-2 --set /apps/osso/hildon-desktop/portrait_wallpaper -t bool true

Code:

gconftool-2 --set /apps/osso/hildon-desktop/edit_mode_portrait -t bool true

Or use Configuration Manager (GUI)
go to APPS > osso > hildon-desktop
and Tick Portrait_Wallpaper and Edit_mode_portrait

reboot, then try to copy your backgrounds