HP Deskjet 990CXi over TCP/IP

Has anyone experienced any problems when setting up a HP Deskjet 990CXi printer to print exclusively using TCP/IP printing. We want to eradicate as much ‘Microsoft Printing’ as possible, but it seems that whenever I set-up a 990 using TCP/IP printing , it stops working within a few days.

We are using Intel NetPort Express 10/100 print servers.

Our network is quite slow, therefore we need everyone on TCP/IP printing to get the most out of our current set-up.

I’ve downloaded NT drivers from HP and even tried explaining to HP support, but both were worse than useless.

Does anyone have any ideas?