Full reception on my Nexus 7 3g but no 3g access on Vodafone

[VoodooGuy]

Hi guys, I I recently purchased a new nexus 7 3g but can't seem to actually get 3g access... It's got full bars and the mobile data is turned on, and the apn shows Vodafone Au but if I open any app it says it can't connect or no internet access.

Anyone run into this problem or have any ideas?