I Noticed this type of issue happens with the cracked TomTom software and maps. Unfortunatley I havent worked out a fix for it yet!
Hopefully someone else can tell me?
If i get software running it then tells me "No Maps Found!"
but device itself works beautifully!
Sorry I cant be more help
Mine works perfectly but ive got the genuine software and map. When I purchased the unit however I was told not to connect to Home for 3-6 months as people were having problems with new units trying to update when the installed software was very recent.