Yeah, I read about the whole cable and usb port thing. I think it is that too...
HOWEVER! I figured a sense ROM would let me get around the problem. I flashed OMJ's rom and when I plug in the charger, navigator pops up.
The solution?? If you go to settings, you can take off automatic launch when you plug in the "car charger" (which is really just my wall charger). Therefore, when I plug in any charger, it does not run the app.
I think it is my usb port on the actual phone because I used 2 different chargers and the problem persisted.
So, the problem persists technically but I will not get a new evo until it is absolutely necessary. Thanks for the help guys! I am going to miss gingerbread