I bought an Airport Extreme about two months ago, and it was a dud right out the box. I returned it to the company we order our products from, and they just got me a new one yesterday. I set it up, piggy-backing my modem, and its working fine. The problem I am having is that the light is not a solid color, its constantly flashing. Do not ask me what color, because I am red-green colorblind, and I couldnt tell you what color it's flashing. Like I said though, its working fine. Thoughts? My other question is, does anyone have suggestions for a proper wireless setup? I went to the Airport Utility, set up the name and password, and everything connected. The only issue I had was after I set up my iMac, I got an "IP address is used" message when I tried to connect my Macbook. Again, it connected just fine, but maybe I did something wrong? Thanks for the help. EDIT: This is the message I get when I open Airport Utility: I hit continue, it reads the Airport Extreme configuration for a few minutes, then it says it cant recognize it.