To the Gurus

I bought a laptop (Compaq EVO N1000C) from my employer, installed WinXP and all the drivers but for some reason I can't connect to my ADSL router and to Internet.
I went thru all the sotware/hardware checks everthing seems OK.
I get an "Network cable unplugged" message in the network connection page, what ever I did can't seem to resolve the issue.
Any help much appreciated.