My AirPort is connected and appears to be working properly. My internet via router & modem is working properly and can be accessed with no problem via other devices (iPad, etc). However, even though my AirPort indicates I am connected to the wireless network, I am unable to oonnect to the web.
I have restarted the computer several times and attempted to adjust settings, however nothing is working.
What is the make & model of your Internet "router & modem?" How do you have AirPort configured with this other router? That is, is it configured to join its wireless network or to extend it? Finally which AirPort model do you have?