Cannot run example "Server" sketch on this site.

I just started learning about arduino today and have been focused on the Ethernet shield.
I tried to run this example:

but get the following error:

server.ino: In function 'void setup()':
server:21: error: cannot allocate an object of abstract type 'Server'

Am I missing anything?

iopins

Yes, you're missing lots of detail.

The Server is a deprecated instance. Use EthernetServer instead.

Be sure to select adresses correctly (a free IP and the correct gateway)
The examles can be modified a little and they should work..