loosing time

Hello all

I have my vera 2 1.1.1350 connected to an access point
i accessed my vera yesterday and i have found that i lost the vera time (it became the defualt time 2010/…)
I changed it in the location tap
Today the same thing happened

Although i have an internet connection

what the problem?

The solution is here:
http://wiki.micasaverde.com/index.php/Install_NTP