I'm on a G4 v. 10.5.1 and for the past year or so my DVD player hasn't been reconizing DVDs. The message says that the disk has no volumes that Mac OS X can read. I think the version DVD player 3.1.1 and I was told that if I upgrade to 4.6 that may help the problem, but everytime I try to install the upgrade it never works. The DVD player upgrade icon appears, and when I click it, it goes to DVDplayerUpgrade.pkg, but when I click that, nothing happens. What's going on?