I am running a couple Novell OES 6.5 Sp6 servers that run NDPS on them. I have a HP Laser Jet 4000 printer that used to have a HP Jet Direct170x print server attached to it. The Jet direct died some serveral weeks ago. I replaced it with an old Linksys print server but it too had problems of its own after a while. I now have bought a new DLINK DP-301P+ print server but I am unable to print to it through NDPS. Both NDPS managers show an I/O error.

What could be happening?