Unresolved symbol erros, just compiled 2.4.21

[Z_God <z_god@iecrash.tk>]

Hi,
I'm using Debian 3.0 Woody and I just compiled 2.4.21 according to this page:
http://www.linmagau.org/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=158
When I load certain modules using modprobe, I get unresolved symbol errors 
though:
# modprobe ipv6
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: unresolved symbol nf_hooks
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: unresolved symbol nf_setsockopt
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: unresolved symbol nf_getsockopt
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: unresolved symbol nf_hook_slow
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: insmod 
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o failed
/lib/modules/2.4.21/kernel/net/ipv6/ipv6.o: insmod ipv6 failed

Does anyone know how to fix these or maybe a better way to install a kernel 
with Debian? Thanks in advance.
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