I received acquired a Toshiba A2 HD DVD player. I am finding that the backup copies I've made of my DVD's, using AnyDVD & CloneDVD, are not always being read by the Toshiba machine. These are non-HD discs, not HD discs. I have both an external Sony burner and an internal burner in a fairly recent Gateway machine, for example, a backup copy of Finding Nemo burned on both drives is not readable by the Toshiba. Any ideas?