Some users in the HabForum mention that they were having some troubles with their copies of AnchorBay’s now discontinued SpaceCamp DVD.
They are aware of the problems and you can send back the disc to get it replaced if you’d like.
Visit http://www.anchorbayentertainment.com/about/faq.asp#Contact for more information including how and where to send in your defective disc to get a new copy.