I'm using DVD Shrink v3.1.6, winXP, pioneer dvr-105. The disc plays fine on the PC, but is a blank disc according to my standalone DVD player. I've copied DVD okay before. The media i'm using is 'Bulkpaq 4x speed'.
Try your copy in different standalone's. Some standalone's refuse to play burned discs. You might give some higher quality media such as Ritek, TDK, Fuji or Verbatim a try as well.