Loading modules during startup

[L.V.Gandhi <lvgandhi@gmail.com>]

I have put atl2 in /etc/modules and but after booting I see this in messages.
localhost:~# cat /var/log/messages |grep atl2
Feb 21 12:16:11 localhost kernel: atl2: disagrees about version of
symbol struct_module
Feb 24 18:48:22 localhost kernel: atl2: disagrees about version of
symbol struct_module
Feb 24 18:52:37 localhost kernel: atl2: disagrees about version of
symbol struct_module

But when I load manually as
insmod /lib/modules/2.6.18/kernel/drivers/net/atl2/atl2.ko
I get everythink OK and I could use /etc/init.d/networking restart to
start internet connection.
I also checked for anyother modules in /lib/modules using find. result is
localhost:/lib/modules# find . -name atl2.*
./2.6.18/kernel/drivers/net/atl2/atl2.ko
Any reason why it happens.
What should I do to boot module during boot?

-- 
L.V.Gandhi
http://lvgandhi.tripod.com/
linux user No.205042