I have a Sony Vaio VGN-Z11MN and use a docking station. I have just run a long Ethernet cable to my router (I have been using wireless as the router is in another room) but it only works if I plug it directly into the laptop. If I use the docking station connection there is no connectivity. My three network drivers are: Intel 82567LM Gigabit Network connection, Intel WiFi Link 5100 AGN and Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller. I currently have the wireless switched off. All other aspects of the docking station are working fine.