[질문]iptable 컴파일시 에러

iptable를 소스로 컴파일 하는데 자꾸 저런 메세지가 나타납니다.
OS는 cent os 4.6 버전입니다. 왜 그런가요?  glibc가 문제인가 해서 설치하고
 해봤는데 똑같네요..

고수님들 부탁합니다.. 


/lib/modules/2.6.9-67.ELsmp/build/include/linux/config.h:6:2: #error including kernel 
header in userspace; use the glibc headers instead!
In file included from /lib/modules/2.6.9-
67.ELsmp/build/include/linux/netfilter_ipv4.h:8,
                 from /lib/modules/2.6.9-
67.ELsmp/build/include/linux/netfilter_ipv4/ip_tables.h:26,
                 from include/libiptc/libiptc.h:6,
                 from include/iptables.h:5,
                 from extensions/libipt_ah.c:8:
/lib/modules/2.6.9-67.ELsmp/build/include/linux/config.h:6:2: #error including kernel 
header in userspace; use the glibc headers instead!
Extensions found: IPv4:recent IPv6:esp
cc -O2 -Wall -Wunused -I"/lib/modules/2.6.9-67.ELsmp/build"/include -
I"/lib/modules/2.6.9-67.ELsmp/source"/include -Iinclude/ -DIPTABLES_VERSION="1.3.8-
20070721"  -fPIC -o extensions/libipt_ah_sh.o -c extensions/libipt_ah.c
In file included from /lib/modules/2.6.9-
67.ELsmp/build/include/linux/netfilter_ipv4.h:8,
                 from /lib/modules/2.6.9-
67.ELsmp/build/include/linux/netfilter_ipv4/ip_tables.h:26,
                 from include/libiptc/libiptc.h:6,
                 from include/iptables.h:5,
                 from extensions/libipt_ah.c:8:
/lib/modules/2.6.9-67.ELsmp/build/include/linux/config.h:6:2: #error including kernel 
header in userspace; use the glibc headers instead!
make: *** [extensions/libipt_ah_sh.o] Error 1