in my magix system, i have a did block of 200 to 699 which covers all my extension range but obviously not my calling groups. i am using the calling group 771 and i tried to renumber the group to a number within my did block(from 771 to 466 actually) so people can call the calling group thru did...the system doesn't seem to accept the renumbering of the 771...pls give me renumbering details...