modprobe hostap_pci error with DWL-520 PCI

[Andrea G. Forte]

Hi,
I am trying to set up an AP using a DWL-520 PCI card on a RH Linux 2.4.20 
kernel.
Now, the PCI is version 2.1 and not 2.2 but I red on this mailing list of 
another guy that was able to use the same PCI card with PCI 2.1 with no 
problems.
When I type "modprobe hostap_pci", the error I get is:

init_module: no such a device

insmod /lib/modules/....bla bla..../hostap_pci.o failed

insmod hostap_pci failed

I already recompiled the kernel.
Anybody can help please???
Andrea