[Headly]

For starters check your cable and make sure the wires are in a different order on each end, if so then you have a crossover cable. Also make sure that your cable is connected to the PC and Xbox before you turn on your xbox. If it is not then the Xbox senses no connection and does not set an IP. Also if your are like me and have two network setups, one for broadband and one for my xbox connection, make sure to disable all connections beside you xbox.