Octagon SF918 HD Key help

Im After some advice on updating keys, every time i try to update the keys i get the Message "Failed Unknown CAS Type"
Anyboby know why?
Im downloading The Correct Files Octagon SF918HD Keys.
Any help would be apreciated.
Animal666

its okay, sorted it, just have to put the keys in a folder called 'keys'. works a treat then.
silly me.