Changing Output By Printer

I have a DB that prints fine on most printers but not all. I'm using FMP ver 6v4 on Win XP and 2000 work stations, Server 5.5 on a Win NT server, and printing to network printers (tcp/ip). On my layout, I have text baselines selected for most of the fields. These fields are small and contain serial#'s and such. When I print the layout, some of the text baselines print and some don't. The text baselines show in the preview mode but some do not show on the printed page. Sliding has been verified off and the baseline color is black. The only specific type of printer having problems is an HP 4000 Series PCL6. Other printers produce a correct print out. I have the latest/correct drivers installed from HP and even set up a seperate tcp/ip port for the printer to install local drivers instead of the driver being installed from the server. Still no lines. This might be a problem between the NT server software and the Win XP or 2000 workstation. Any ideas or does anyone else have a similar problem?