If you have a BlackBerry Data Plan and it's still saying data connection refused then go into Settings>Options> Mobile Network and make sure that Data Network is turned on. You should also be able to go into Settings>Options>Advanced Options>Host Routing table and see if there are entries. If there is then highlight the first one, click Menu and then Register Now. That should pull the settings for you internet to your phone through the network. If that still doesn't help then try calling your Carrier to make sure everything is provisioned correctly in their systems for internet access.