Hi, I'm having a problem connecting my mba to an airport express wireless network. Hoping someone might be able to help... (note: I'm posting this using a friend's PC, so apologies if the question has been answered before, but the time I have to browse through the forums is rather limited...) Here's the situation: I'm on holiday in a very remote area and don't have an internet connection where I'm staying, but there is a cafe nearby with some form of broadband using an airport express router. The owner is quite happy for anyone to use the connection. I'm unsure about the exact router settings as I don't have access, but as far as I can tell it's running a totally unencrypted (!) G network using DHCP. For some reason, my mba is having a big problem trying to connect. It does seem to connect fine at first, but when checking the airport settings in more detail, I see an error message telling me that "airport is connected, but has a self-assigned IP address", in the range 169.x.x.x. The strange thing is, I can't even connect when using my windows 7 bootcamp partition. The ssid is listed, but when trying to connect the error message simply reads "Windows cannot connect to this network". I found this very strange, so I tried to connect with my iphone, and it works absolutely fine! The IP address assigned to the iphone is in the range 10.0.0.x (which I'm guessing is the default for airport express routers?). Clearly, the mba is not being assigned an IP for some reason. To top it all off, there was a person sitting next to me with a Dell which was working absolutely fine. grrr. So, I thought this might be a hardware problem, but there aren't any other wireless networks around to test. So, I borrowed a friend's windows laptop and created an ad-hoc connection to my mba. This worked fine, so I'm thinking my wireless card isn't broken. I'm running the latest firmware on my mba (assuming no update has come out in the last 2 days), but I'm unsure whether or not the router itself is up to date. Also, I've checked all my aiport settings 100 times over to make sure they are all on the correct values (i.e. DHCP enabled, no static IP's etc). As far as I can tell, everything on my end checks out. Even in windows, everything is on default/automatic. My mba was working perfectly before I came away. My only thought is that there is some strange incompatibility between my mba wifi card and the router (which seems very unlikely), or something to do with the particular settings currently in use by the router. I guess if the router has some out of date firmware this would also be a possibility, but I'd like to eliminate any other options first before I go complaining to the owner that my particular laptop doesn't work and he should update etc, when every other computer seems to work fine... Has anyone come across this kind of problem before??