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Eth-module used by -1 modules?

Hello there,
I attached the patch ds-8.tar.gz (DiffServ patch)into my kernel 2.2.14
and I recompile it with the options of QoS and DiffServ, but now it
happens a strange thing with the module of the ethernet card and my
network doesn't work.

In particular when I configure my interface by the following command:
>berlin:~# ifconfig eth0 netmask up
so the module (de4x5) of my eth card is mounted. But look at the output
of lsmod command:

>berlin:~# lsmod
Module              Size Used by
de4x5              40372  -1  (autoclean) (unused) 76   0  (unused)
parport_probe       3492   0  (autoclean)
parport_pc          7472   1  (autoclean)
lp                  5412   1  (autoclean)
parport             7464   1  (autoclean) [parport_probe parport_pclp]
serial             42612   0  (autoclean)
memstat             1476   0  (unused)
....the module of eth card is Used by -1 modules!!!!! What does it

Then I set the route table by the following command:
>berlin:~#route add -net netmask dev eth0
>berlin:~#route add default gw dev eth0
and I try to see it by the following command:
>berlin:~ # route
>Kernel IP routing table
>Destination   Gateway  Genmask Flags Metric Ref Use Iface

...blocked!!! ...there isn't other output!

So I would be very grateful if you could help me.
Marco Fabiani

PS:This is my environment:
           Linux SUSE 6.4
           Kernel 2.2.14
           Iproute2 version:2.2.4-59 (Included in SUSE 6.4)