I have a MacBook Pro 2.2GHz 4GB RAM running OS X 10.4.11. I connect to the internet wirelessly using a Linksys WRT54G wireless router. I do not have -- nor have I ever had -- a problem connecting to the internet on my MacBook. Today I bought an Airport Express 802.11n for the sole purpose of playing my iTunes music on my home stereo wirelessly from my MacBook. I do not wish to replace my Linksys router; I want to use the Airport Express on my existing wireless network to stream my music. However, no matter what I seem to do, I cannot get this set-up to work (and I am about to toss the Airport Express off my balcony). Perhaps some kind soul can lend me a hand... When I plug in the Airport Express to the power and connect it to my stereo (using the Line Out port) the Airport Express flashes green once, then turns solid amber for 2+ minutes, then flashes amber continuously. Then when I run the Airport Utility (that I installed from the CD that came with the Airport Express) it says "Discovering Apple Wireless Devices" and then after a few moments says "Airport Utility was unable to find any Apple wireless devices. Please make sure the Apple Wireless device you want to set up is plugged in and in range of your computer, and then click rescan to try again." I have clicked "Rescan" over and over and over again, but to no avail. My laptop is right beside the Airport Express and the Linksys router, so that cannot be the problem. I've tried repeatedly to reset the Airport Express (with a paperclip, both plugged-in and unplugged per the manual) but that does not seem to help at all. Does anyone have any ideas how I can get my MacBook to recognize the device and then configure it for use in my home? Thank you very much, Scott P.S. I have also upgraded the firmware on my Linksys router to the most up-to-date thinking that might have something to do with it, but apparently not.