Sony Ericsson W810

Aloha, I have the w810i, and am on Cingular on Kauai. I am unable to connect to the internet at all, I can send text messages, but cannot recieve email messgaes, or Picture messages When I try to connect I get "Conn. Failure. Check Settings. If problem persists, contact operator for support." The thing is I did all the setup from the Sony Ericcson site, and it still doesn't work. Please help, I am not all that tech savvy, so as much detail as possible is much appreciated. Mahalo,
Sethicus