DWL-650+ Win98SE Freeze downloading large file

Hello,

Problem:

Wireless network card causes system freeze sporadically.

System:

My machine is a Toshiba Tecra 730CDT with 32MB ram and 2GB disk, with
Win98SE and all the windows update patches applied successfully.

I have a D-Link DWL-650+ Wireless 802.11b card that seems to work ok
except the machine frequently freezes up when surfing. I have found
a
repeatable scenario that causes the freeze: try to download a 27MB
file
via FTP from another machine on my LAN. Freezes every time.

Previous attempts at remediation:

Installed the latest driver for the card, version 3.0.7.

Disabled all unused COM ports in Device Manager.

Disabled all unused LAN cards in Device Manager.

Freed up all IRQs I can (IRQ3)

Tried different PCMCIA ports on the machine.

Still freezes.

Any ideas?

Thanks, very much,

Ed