can't print to windows 98 machine being used as print server attached with USB p

The home network i have setup up is using a windows 98
machine as a
print server. i have two printers attached to it, one
via the
parallel port (LPT1) and the other via a USB port. I am
running
windows 98SE on the machine I am sharing the printers
from and XP and
2000 on two other machines ont he network. I can see
both printers
via my network neighborhood but am unable to print to the
printer
attached to the USB port. The printer attached to the
parallel port
prints just fine both locally and via the network.

the printer attached to the USB port is an Lexmark 1100
series
the printer attached to the parallel is an Hp laserjet
and works fine

I have tried installing a new PCI card with USB 2.0 and
tried printing
that way and am still not able. i am able to print
directly from the
machine, just not over the network.

there might be some incapability issues with the drivers
as i am
trying to print to a 98 machine from an xp machine, but i
went to the
lexmark website and downloaded the appropriate drivers.
i am also
able to print regularly so i am stumped.

windows error message is that there is a problem with
current printer
setup. i am also unable to print a test page over the
network but can
do so on the machine locally.

any help would be muc appreciated. thanks.