Hardware malfunction when installing Belkin wireless network card

I have a Belkin wireless network card that previously worked fine in a
Pentium 2-233 machine. I put it into another more modern machine - 666 mhz
or thereabouts with 128 Mb ram and Windows XP but after I've ran the
installation disk and put the card in (in the proper order, I've done this
before) I get the message
*** hardware Malfunction
Call your hardware vendor for support
NMI Parity Check/Memory Parity Error
the system has halted.

What can be causing this. The only other thing I have in any of the PCI
slots is a modem.

Is something else conflicting with the card, or is the card simply
incompatible with the motherboard or processor or something? Any
suggestions, welcome!

Thanks.