DWL-G520+ makes PC boot up when screen is turned on

Hi,

I've got this strange thing with my HP Vectra VL.400 Windows XP PC.
Since I installed the D-Link DWL-G520+ card, the PC seems to boot up
without me wanting it to.

When I do a shutdown in Windows XP, the PC powers off. When I then
power off the screen or a printer then the PC boots up again ?!

I've checked the BIOS and disabled everything I could find about ACPI
and APM but still the same thing.
I've put the NIC in another slot but this also does not help.

Someone else had this experience ?

TIA