I just set up my Airport Extreme, which is connected to my modem, and created a new network. The problem is that when I connect my mbp to my new network, it doesn't prompt for the password which I have set to wpa2. I'm not sure if it's the cause, but I called my ISP about my Airport Extreme previously finding an invalid ip address and just overall not working. He told me that it's strangely acting like a hub instead of a router which he said is not secure. I'm not really sure what he meant but he doesn't seem to know how to fix it. I can connect to the internet but the problem is that there is absolutely not security and perhaps that's the cause of the airport acting weird? Sorry, I have no clue what I'm talking about, but I'm just letting you guys know what I've been told and perhaps my problem can be solved. Thanks!