Dvd reader issues?

Hi,

I live in NZ and have a Japanese import 2003 Honda Accord Euro. I replaced the battery and the nav needed a reboot. I tried inserting the Honda disk and I got the check disk error message. I've taken it apart and attempted to clean the lens but to no avail.

Andy, I guess you are in the states but any chance you can tell me what you do to get this thing back up and running? It also controls the air con system so it's really annoying...

Thanks and look forward to your feedback.