I also was not able to get a code for my Denon DVD 2200.
Outlaw has really dropped the ball when it comes to remote codes. The have 1, that's right ONE code for Denon DVD players. Yet I have accessed codes for 3 other dedicated remotes to control the Denon.
And the Denon isn't an obscure model, it was reviewed by Absolute Sound and Sound and Vision.

Pathetic!
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990/Oppo BDP-83SE/Toshiba A3/Emotiva XPA-3/B&K ST-1430-II/Gallo Ref 3.1/Gallo Reference AV-Center/Gallo A'DIVAti(3)Rear/ MIT Term 2&4 Cable/Mitsubishi WD65C9//Monster HTS-1000.