Okuma cadet mill with osp700m

new to Okuma. we have a cadet mate w/OSP700M controller trying to load a program from a floppy drive any help
would be great

Try pressing EDIT, then EXTEND 2 or 3 times, then MS-DOS, Then EXTEND 2 or 3 times then PROGRAM-INPUT, then FD0:.

Dave in Ohio

THANKS