Wont Learn

[SuperCoupe007]

I did a search on how to program ignition key(s) for a Mark GenII and looked it up in the ownersa manual as well, but I can't seem to get it to learn it. I only have one key. The computer that Ford uses to program keys, is it expensive ? I got the key from Ford, its supposed to be the encoded type. What tricks have u guys done to make it work ??

can keys be un-programmed manually ????
Thanks....