Have just flashed my phone with the generic 30.80.56 firmware and now cannot access anything with the browser or send/recieve mms. What do I do to fix this?

Have just flashed my phone with the generic 30.80.56 firmware and now cannot access anything with the browser or send/recieve mms. What do I do to fix this?
Flash again i gues? It works for me when i have problems with a flash. One known issue though is that you can't stream video from 3!