problem with iPhone app

Hey. I got a iPhone 3 g with ios 4.2.1 Has just got the cool chess.com app, I just really want to play online chess without leaving the board so I have put the settings like that. but my opponents move are not beeing updatet before I leave the board and load it again. and I cant play live chess i this app or am I wrong.

Both live chess and updating online chess are working on my girlfriends HTC Sensation Phone Why.

Please sombody help me so I can play chess all day on my phone.

Nybyggeren