'Device not ready' to D-Link DFE-580TX Wired Network Adapters

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http://askubuntu.com – My 3 Quad port network adapters can be recognised when I write the 'ifconfig' command, but they all seem to be in 'Device not ready' state when I click on the networking tab at the toolbar (please see pictures below). At the 'System Setting' they all seem to be recognised but again, their state doesn't change when I plug a network cable into them. Could anybody advise if there is a solution to this problem? I'm a new Linux user (Have been using it for the past month). The network adapters I have are the D-Link DFE-580TX. The adapters used to work excellent with 11.10, but since I switched (HowTos)