I have a machine running Windows XP Pro SP 1 and AutoCad. When a plot job is sent from AutoCad to the DesignJet 500 plotter, most of the time the job will stall while uploading to the plotter. After a minute or so, the job will clear from the queue as if the job was done. The plot job is sent from the pc to another workstation acting as a print spooler, also running XP SP 1. From there it is sent to a JetDirect card then the plotter. There are other stations setup the same way that are not having any problems. All of the latest drivers and patches are installed, the JetDirect has had its firmware upgraded. Autocad was installed on the station before any anti-virus software was installed. It is printing through the HP printer port and not the TCP/IP standard port. I thought the NIC or the switch may be at fault, but the user does not have any complaints working with large files over the network. Thank you for any suggestions you may have.