ps3 dns error

[haislip]

ive been using z4root to temp root my evo and using wireless tether from the market for the past 5 months, to play black ops online with my ps3. last night i got a dns error and now i cant get internet connection and i havent changed anyting not even an update to my phone. i called sony and the rep said that they cant guarantee that kind of wireless connection but ive used it for the past 5 or 6 months help?