Open your router and post the settings you have setup for the printer. Likely its an IP address with a :xxxx port suffix (ex: 192.168.1.20:9100) Your printer settings must match exactly these on the PC and everyone I have used uses RAW.
Often the ip address you assigned the print server has to be outside the range of those being assigned by DHCP.
After you get it where everything is seems to be set right, drivers are installed, but its still not working and you dont know why... turn it all off and when you turn it on the next day it will work fine. (odd but true in many cases LOL)