Blocking Issues?? during XP upgrade from 98

I am trying to u/g from 98 to XP home and have received
notification of a blocking issue as follows...
"Blocking Issues ...
Unsupported Hardware Configuration...
Conflicting Devices
Setup has detected an incompatibility between your video
card & computer's mainboard. Because of this, your
computer may not start up after the upgrade."

My Video card is a GeForce2 MX/MX400 that works fine and
in the Control Panel/System/Device Manager settings tab,
no errors and no conflicts of any kind are reported.
Furthermore, using System Information/Components/Problem
Devices, I get a message that says.. "There are no devices
with problems on the machine."

What to do?
Conflicted in Cleveland