Print Server Drops User Connection

I have a print server running NT4, SP6. Recently it has been dropping a single user from the network printers. I have reinstalled the NIC, and it still happens. One message I receive on a client is “Printer is not connected to the Network, please check your network coonection.” A reboot usually brings the printers back on-line but once I click any of the network printer it goes offline. all other client machines are performing normal routine print jobs from the server\printers. Using another user log in @ the same machine will allow me to perform the printing jobs from the same network printers except when I print with the particular client of the machine. Please help !