Biggest mistake. I bought the card in the US while traveling and now I'm back home in Canada. I am so disappointed with Linksys. I have only been purchasing Dlink and Netgear products and purchased this EC1000 for my Dell Inspiron 9400 with Windows XP. I purchased the USB gig adapter and it worked like a charm, but wanted something less bulky, so I purchased the EC1000. Got a link-light, but no IP address. I have Wireshark protocol analyzer and thought I would see why it isn't working. I could see the express card's MAC address and tried manually entering it in the advanced configuration options with no success. I only see data leaving my card and no data being received. Connected it to - my Netgear 10/100 DS108 hub, same thing. - my cisco 10/100 switch, same thing - my linksys wireless access point, same thing Also noticed that the express card RJ45 is very sensitive. if you just jiggle the RJ45, the link light goes out. Tried the cable linksys provided and 2 of my own. Very poor connection design. Connected the adapter to my Fluke Integrated Network Analyzer (it is 10/100/1000) and it could not see the card as well. Called Feb 18 around 11:30 am and 58 minutes on hold. Love the constant reference by the on hold automated attendant about "Linksys's award winning customer support". I wonder what award? VOIP system for the help desk is very poor with a lot of latency. Had to repeat a lot of my info. The help desk person needed to know who my internet provider was, even though I'm in my office. She kept saying my card wasn't working even though I told her I had a link light and could only receive data, not send. Asked me to call Customer Service to ask for a RMA. Called for RMA and was told that they can send me another card but I have to PAY TO RETURN the faulty card. Now I remember why I shyed away from LINKSYS for so long.