Nic card modules

[Piero <ludovico.ariosto@wanadoo.fr>]

A question about Nic cards and modules.
This is the output of "ifconfig eth0":

eth0      Link encap:Ethernet  HWaddr 00:05:5D:AA:3B:E0
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:472 (472.0 b)  TX bytes:2827 (2.7 KiB)
          Interrupt:11 Base address:0xb800

And this are a few lines from "dmesg":

pcnet32.c: PCI bios is present, checking for devices...
via-rhine.c:v1.08b-LK1.0.1 12/14/2000  Written by Donald Becker
  http://www.scyld.com/network/via-rhine.html
eth0: VIA VT6102 Rhine-II at 0xb800, 00:05:5d:aa:3b:e0, IRQ 11.
eth0: MII PHY found at address 8, status 0x782d advertising 05e1 Link 45e1.

From all this, I entail that my Nic card, a Dlink dfe-530tx (module 
Via-rhine) is working.
But the output of "lsmod" is:

Module                  Size  Used by
slip                    7252   2  (autoclean)
slhc                    4336   1  (autoclean) [slip]
af_packet               6136   2  (autoclean)
nls_cp437               3896   2  (autoclean)

So, no Via-rhine module seems to be present.
The ouptut of "modprobe via-rhine" is:

Hint: insmod errors can be caused by incorrect module parameters, 
including invalid IO or IRQ parameters
/lib/modules/2.2.20-idepci/net/via-rhine.o: init_module: Device or 
resource busy
/lib/modules/2.2.20-idepci/net/via-rhine.o: insmod 
/lib/modules/2.2.20-idepci/net/via-rhine.o failed
/lib/modules/2.2.20-idepci/net/via-rhine.o: insmod via-rhine failed

Form this, I don't know what to think: is the Via-rhine module already 
working, or can it work at all?

File /etc/modules has the following (scheletric) content:

# /etc/modules: kernel modules to load at boot time.
#
# This file should contain the names of kernel modules that are
# to be loaded at boot time, one per line.  Comments begin with
# a "#", and everything on the line after them are ignored.

Have nic cards modules special properties? Do they have a different name 
 when they are loadable and when they are loaded?

I'm a bit puzeld.
Thanks,
Piero.