Hi there, I'm Tim and will be assisting you today. I have over 15 Years as an Engineer and have been with eBay, DoD and many others. I will do my VERY BEST to help you. If you like i can offer remote access and a call. In addition, with any positive rating I will support your question going forward for free.
Can you try skipping the airport and connecting directly to your modem to make sure internet is working?
Sorry for the late reply. Has this airport ever worked? And are you using cable or DSL?