Error compiling iptables

[Man-wai CHANG]

what is the meaning of the following error? I found nothing relevant in
google.

root at server:/usr/src/iptables-1.3.4 # cat compile.iptables
#!/bin/sh
#
# check out the SRPM, drop in the new tarball, rpm -ba iptables.spec
#
# cd /usr/src
# bunzip2 -dkc /samba/linux/iptables/iptables-1.2.9.tar.bz2 | tar xv
make \
        KERNEL_DIR=/usr/src/linux \
        LIBDIR=/usr/lib \
        BINDIR=/usr/sbin \
        MANDIR=/usr/share/man/en \
        INCDIR=/usr/include
exit 0
...

root at server:/usr/src/iptables-1.3.4 # ./compile.iptables
/bin/sh: extensions/.expire-test: Permission denied
/bin/sh: extensions/.expire-test6: Permission denied


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