Magnavox remotes are not all made by the same company, so they don't all use the same codes. Therefore, you would need to provide a model number for your remote for anyone to be able to help you. Once we have that model number, all we would do is go to
http://www.gemini-usa.com to see if they have a PDF of your printed manual and if so, see if the manual lists DVD codes. If it doesn't, it probably means that your remote doesn't support DVD players.
If that's the case, you need a new remote.
Rob
http://www.hifi-remote.com