Red Hat :: Copying Selected Text Using Vi?

how can i copy and paste selected text from one file to other using vi in RHEL5.i googled and found some methods,like just use m to mark the start, with an arbitrary buffer name (so you might type mx). Move your cursor down to where you want to stop copying, and type y'x (or d'x if you're cutting and pasting). Then move the cursor to the point where you want to paste, and type p. when i do this it pastes the entire line of which a part is selected so in essence it is working as yy. when i open a new file using vi and try to paste it says "nothing in register".what i exactly want to do is copy only the selected text as shown above in red and paste it in a new file.