netfilter unavailable

["storm66@club-internet.fr" <storm66@club-internet.fr>]

Hello,

I try the last 2.6.21 and I see some problems with the netfilter stuff.
When the kernel boots the messages are clear : netfilter is here 
a2000 kernel: [42949402.180000] Netfilter messages via NETLINK v0.30.
a2000 kernel: [42949402.400000] nf_conntrack version 0.5.0 (764 buckets,
6112 max)
a2000 kernel: [42949403.510000] ip_tables: (C) 2000-2006 Netfilter Core
Team
...

All (I think) lodules are loaded :
iptable_mangle          1936  0 
iptable_raw             1392  0 
iptable_filter          2000  0 
iptable_nat             5668  0 
nf_conntrack_ipv4      12412  1 iptable_nat
ip_tables               8904  4 iptable_mangle,iptable_raw,
                                iptable_filter,iptable_nat

But all commands through "iptables" are unavailable with a cryptic
iptables message :

iptables -vnL
iptables v1.3.7: can't initialize iptables table `filter': Module is
wrong version
Perhaps iptables or your kernel needs to be upgraded.

I do not know what "version" is wrong, I try with the v1.3.6 and the
V1.3.7 with the same messages.

Regards

JP Pozzi