install php5-mysql ports error!

configure: error: mysql configure failed. Please check
config.log for more
information.
===> Script "configure" failed unexpectedly.
Please report the problem to aleFreeBSD.org [maintainer]
and attach the
"/usr/ports/databases/php5-mysql/work/php-5.1.4/ext/my
sql/config.log"
including
the output of the failure of your make command. Also, it
might be a good
idea
to provide an overview of all packages installed on your
system (e.g. an `ls

/var/db/pkg`).
*** Error code 1

ports is
fresh，mysql-server-5.0.22，mysql-client-5.0.22
all installed also。

uname -a：
FreeBSD www.test.com <http://www.leshou.com/>
 6.1-RELEASE-p2 FreeBSD
6.1-RELEASE-p2 #1: Wed Jun 21 02:13:48 CST 2006
rootwww.test.com<rootwww.leshou.com>:/usr/obj/usr/src/sys/MYKERNEL
i386
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