I purchased an AirPort Express approximately a month ago (the newest 2012 version). I am a college student attempting to use this in my dorm room. I registered the AirPort Express's ethernet mac address with my school's network and connected an ethernet cord from the AirPort Express to the ethernet wall port provided in my dorm room. Everything worked perfectly. Now a few days ago I moved into a new dorm room. I plugged in to the ethernet wall port here and I am getting an error message that it cannot get an ip address. (I tested the ethernet port by plugging it into my computer and it worked fine). I have tried reseting the AirPort Express (soft, hard, and factory resets). What am I doing wrong? Any ideas on how to fix this? Thank you!