I cant connect to interenet or any other computer on the network though sbs2003 server. Server will ping its own IP address but not any others. Even if I connect the router directly to server it wont ping the router while I connected a laptop directly and it pings the router. I tried repairing network connection and it says can not clear arp chache. if I do arp -a its says no entry found. it all started after adding another hp wireless printer on the server. may be coincidence. simple setup: comcast business gateway connecting to 20 port switch. sbs 2003 server and 15 other comps connecting to switch. network card status shows as working normal and link status lights are green. I see link lights on ethernet port as well. any pointers will be appreciated as whole network has come to halt.

After I deleted the printer from the installed printer list and rebooted the server, everything started working the way its supposed to.