How to connect to the Internet with my pre installed web browser on Samsung Vibrant?

I also have Opera but suddenly the pre installed web browser on my Samsung Vibrant stop working. Can't connect to any website it saids page not found or not Internet connection. Then I go to Opera and can browse without a problem. I will like to use this one also since is pre installed in the phone. ThanksHow to connect to the Internet with my pre installed web browser on Samsung Vibrant?Update your phone software.