In my experience, the AR-M451 must have a 40HDD. Drive and 128 mb standard.|
I have sõme of them, and never see that message, As i said, only see in a AR-M451U, with 128mb, or with 384mb, without HDD.
So chek if the copier as HDD.
Sorry, but i c'ant help more, only maybe you need a sharp tecnical help.