[q] net::err_name_not_resolved topic

hi there ...
i have flashed Cyanogenmod 11 on my galaxy GT-s6810 but i got no net service whether through data mobile 3G or wireless networks ..
so when i try to open any page by the browser i gives the error " NET::ERR_NAME_NOT_RESOLVED"
Although I've done the right APN


what to do ... help me plz