Error with Purchased movie redemption code

I am trying to download FREE a Digital Copy, with a redemption code. It is a 2 part download and only 1 part downloaded fully & completely. The second download stopped and will not resume. It keeps giving me this: stopped (err = -50). What do I have to do to get the 2nd part downloaded to my computer after I have recieved this error message? Re-entering the redemption code and trying to start over does NOT work. HELP !