[ubuntu] 12.04 server no network connection

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http://ubuntuforums.org – Hey everybody, im new here... I was playing around with 12.04 server on an old laptop and had quite some fun with it. So i decided to put it on one of my servers. I have just installed a Dell Poweredge 1850 with the latest 12.04 server release and cant get the network online. I am at a point where i dont know how to go on. The installer went through fine, asked me for the primary NIC (I chose eth0 our of 3) and after that it couldnt pick up a DHCP address so i assigned a static IP. I cant ping out and no other machine can ping this server. However, I get a response from pinging lo (Hardware)