I am attemtping to copy Planet Earth series. Each disc contains a selection like Caves, Deserts, Seas, etc. The Main Menu presents with Play All or each selection. If I click (on the copied disc) "Plat All" the disc plays properly. However, if I click on a single menu item, say "Deserts", I just get chapter boxes. I can lick on one to view the "chapter", then I must click on the next chapter box to view that chapter, on-n-on. What am I doing wrong?