I just bought a AirPort Express today and I have been trying to get it to work for the last two hours with no luck. I have an Intel Macbook and a D-Link router and I am just trying to use the AX for AirTunes and wireless printing. Each time I get to the point that AirPort Utility can't locate it I reset by holding down the reset button and I do the following. I run AirPort Utility and locate the AX. At this point it tells me there are two warnings coming from the AX. One because it has default settings and the second because there is no ethernet wire connected (I don't have one and am trying to set it up wirelessly). I then run the setup process (ie not manually), select my network that I want it to become a client on, enter the network password, name my AX, give it a password etc. Then I click update. Everytime I update it to try and make it a client on my wireless network AirPort Utility loses sight of it and the amber light on the front continues to flash. When I log back onto my regular wireless network I can see which wireless devices are connected to my router. My Macbook shows up and occasionally the AX will briefly be listed as connected but never for more than a second or two and AirPort Utility can't find it. Despite being plugged into my stereo AirTunes does not work either.