Ubuntu - required to change password (date 1970)

Hi all, I've recently setup the Ubuntu Karmic (console) image. Any
time it is promply "You are required to change your password
immediately (root enforced)". It seems like the system time is not
correctly setup. I've change it... all goes right until I reboot the
board... Then after login I get "You are required to change your
password immediately (root enforced)" message and date command returns
1/1/1970 01:01:30.

Thank you all,
Sergio.

You have to set the correct time at first.
After that, when you change the password, it is not gonna ask you
again.

Cheers

Solved,
Thank you!