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Message: <blockquote data-quote="JamesL" data-source="post: 1999979" data-attributes="member: 225724">I have the version 6.5 disc installed and would like to upgrade the disc. But I have tried Zenrin versions 7.1 and 7.2 in my current  player and it won't read them. What gives? Do I have to remove the 2005 Nav System and replace it, or is there something else that needs to be done to allow these upgraded discs to work.I have the version 6.5 disc installed and would like to upgrade the disc. But I have tried Zenrin versions 7.1 and 7.2 in my current player and it won't read them. What gives? Do I have to remove the 2005 Nav System and replace it, or is there something else that needs to be done to allow these upgraded discs to work. These are not burned discs...they (7.1 & 7.2)  are from the manufacturer.</blockquote>