I have had the issue of the "can't unlock maps" for the last month or so. I just stopped working one day. I just updated the software to 7.09 and the issue is still there. I have 93K miles and my Dart is about 6.5 years old. Is Dodge still covering the Nav for this issue under an extended warranty? If so, I guess I will have to break down and take it to a local dealer and see if they will fix it.