I have the same problem listed in this thread: http://www.navitotal.com/showthread.php?8449-Cannot-Use-this-map-Western-Europe_1GB-TomTom-ONE-XL

The solution was to go to the link saying FastActivate 24.11.20122 {1.8.8.0}, but when I click on the link, it just redirects me to http://www.navitotal.com/forum.php and not the thread the link is listed to send me to.

Yesterday, I wanted to put some new voices on my TomTom. I downloaded the free english ones from the tomtom site, and i connected my tomtom to my pc. It said I had to download the program TomTom HOME for it to work, so I did. Then it said it had to update a lot of stuff, so I updated it. After the update, I still couldn't install the voices on my TomTom because it gave an error in TomTom HOME. When I tried to start up my TomTom (after disconnecting it from my pc) it gave the error listed in the title of this thread:
Problem with map
You cannot use this map on this device:
Western_Europe_1GB

The only thing I can press is Continue, but when I press that it lets me select a map (Western Europe 1GB) is the only one, and when I press that the same error shows.
What do I have to do?
Thanks in advance!

by the way, I'm a real newbie in this, so explaining every step would be appreciated!