"the network cable is disconnect"

Hi everybody,

(the last post I thought in spanish; excuse me, I'll try to explain in

english)

I have a problem with a computer which I had never seen it... "the

network cable is disconnect"

I explain:

I go to "administrive my computer" and there are there a ethernet wich

"work correctly". Then, i put/plug the cable, and the computer tells me

"the network cable is disconnect"

I try another cable but it tells me the same

I try another router jack (a hole where you plug the cable) to plug the

cable, but it tells me the same

I try with another ethernet, but it tells me the same

I also try with an usb/ethernet adaptor, but it tells me the same

What happen?

Thank you very much and excuse my for my english

Carles