Ethernet suddenly crash

[patocardo]

Yesterday it was everything OK in my PC with Ubutnu 10.4 and WinXP. Suddenly Ethernet stop working at Ubuntu, all what happened in between was a change of user, I trying changin user again, restarting PC, switching the cable (I have two ethernet boards) and nothing happened. It is like a virus attack, I don't know. I am writing now from WinXP in the same computer.
Ubuntu says that I have no cable connected, but as you can see I am connected in Windows
Could anybody help me?

[fela]

What does this command give:

sudo ifconfig

[patocardo]

Thanks fela!, thr net was not checked as available. I do not know but somehow my baby daughter uncheck that.

[fela]

No problem