IGO Problem with time/Hour sync

Hello to all
Need some help
I've installed IGo in my SD card. All good so far. It works really well, except that i don't know why. It changes the hour from the Car. As navigation/radio i have a clarion nx501.
So basically the hour in the GPS is correct. But even if manually i change the hour of the Clarion. Every time i run the GPS it changes the hour of the car to a different timezone, like 10 hours difference,
I've disconnected already the auto-sync in time definitions to put all manually, but doesn't work either. Every time i connect the GPS, the hour changes to a very different timezone.
It sounds to me there's some file in the IGO that defines this i don't know.
Anybody can help me

Thanks in advance
Joao