Check the "about" menu on the empeg and see if it has successfully negotiated DHCP to obtain an IP address.

OR even better, hardcode an IP address (aka "static IP") using Emplode. Whenever I have network trouble with my empegs, it's ALWAYS the failure to complete DHCP negotiations. They just don't seem to like my DHCP server most of the time. Which is weird, cuz everything else on the network (14 machines) has no problems with DHCP.

Cheers