I have several DVDs made up of Mpeg files created in Vegas 6 and menus/burning done in Sony DVD Architect 3c to a DVD-R disc. There is a lead up sequence and a scene selection menu. The DVDs play perfectly well in the many normal players that I have tried but when I try to play them a Recorder/Player (i.e. a DVD player that is also a recorder) the lead in sequence and the menu play ok but when play or scene selection are selected the disc is rejected with an error - "cannot play disc due to navigation error". I have tried the discs in three different recorder/players with the same result. I then re-created the DVDs with another software (Pinnacle Studio 10) using the same Mpeg's with similar lead in and menu with the result that the discs play perfectly well. Unfortunately I have only been able to try the discs in LG recorders and as a result there is an assumption that the problem is with LG. I am not convinced that the problem is with the player particularly since the discs play fine if created using a different application. Rather I am of the opinion that either there is a problem with DVD-A or I am doing something wrong. Has anyone else had a similar experience with DVD recorder/players please? Any help would be much appreciated as I am at my wits end and becoming quite frustrated. BTW the discs have been burnt on my computer, not in the recorder. Thanks