2006 V-6 Coupe Navi system problem
 

Hello everyone! I would like to ask some help to understand what's wrong with my navigation system. It's started a year ago, my system didn't turn on ( disc reading error, contact w/ your dealer. They convinced me to buy an updated disc, witch I did. nothing changed. The said they will check for me for a $ 185. Thanks no. That how much the disc did cost. The only way it's work, if I pushing the three buttons, for the menu, scroll down 'till version and download again. Again, again all the time when I turn on the engine.
So my questions: what I'm downloading?
The computer dead? the disc bad? I need a new car? LOL
Thank you for any suggestion.
Sorry for my English I'm from Europe