BB Torch :: Emails Not Working Through Wifi?

My BB Torch 9800 has stopped being able to use BBM, emails and a couple more apps through my wifi conection. I am in an area where ther is no network signal, so this service is very essential for me. The internet browser on the phone works ok, and some apps work ok (whats app,facebook). I have been onto O2 and they say evertyhing looks fine at their end, and nothing has accidentally been switched off. My wifes phone (BB Storm with T-Mobile) is still working with BBM ok.