Wireless Works ....Wired does not

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http://askubuntu.com – I am using ubuntu 12.10 i am stuck lost what to do ..my wireless connection works fine my wired connection does not ...I would perfer to use my wire connection on this machine any help would be greatly appreactied when i ran this command lspci | grep Network my reply was 04:00.0 Network controller: Ralink corp. Device 539b (HowTos)