I'm on a military base, which has Czee wifi. Czee is a pay as you go wifi connection, much like the ones at airports. I am able to connect to it, but when I try to open a page in safari, it says I am not connected to the Internet, it does not bring up the page to pay for the service. When I use the diagnostic to see what the problem is, it says Airport has a self-assigned IP address and may not be able to connect to the Internet. Any idea what the problem is and how I can fix it?