How to re-install my Ethernet on MacPro ?

Question

Yesterday, I tried installing and using the Witopi VPN to get access to Hulu (I'm in Europe and thus have no access to Hulu, Spotify etc). It didn't work, though.
After removing it again, the Ethernet on my MacPro doesn't work. It works on my MacMini on the same network) and the Airport works also. Just not the ethernet on the MacPro.
Is there somehow to start over with a fresh ethernetconnection on my MacPro ? I've tried removing it and adding a new, but even though I seem to make sure that the settings are like the ones on my Mini, it just says "Cable is not connected" (which it is)

Answer 1

Couple of questions:
Are you running 10.6?
Do you have custom locations?
Finally, if you access your Network pane of system preferences, on the left hand side if you don't see an ethernet, hit the plus sign choose the interface ethernet and click create. (This is assuming 10.6, 10.5 or earlier may appear slightly different).
The other thing you can try is clicking on locations in the top of the window when you have Network Preferences open and choose edit locations. Click the plus sign give your new location a name and click done. Now, click Apply. Close the network window. If the top of the window doesn't have your new location in the drop down, choose the new location. Hit Apply. Check your Ethernet connection.
Hope this helps,
John