libphp5.so error

I'm having a strange problem with PHP. I'm using source versions of apache 2.2.6 and php 5.2.4. Both compiled fine. Here is how I compiled them... __SNIP__ /configure –enable-ssl=shared –prefix=/usr/local/apache-04172007 –enable-mods-shared=all __SNIP__ and php __SNIP__ ./configure –with-apxs2=/usr/local/apache-04172007/bin/apxs –with-mysql –prefix=/usr/local/php –with-config-file-path=/etc/php –with-ldap –enable-ftp –with-curl –with-openssl –enable-zip –with-zlib –with-gettext __SNIP__ Both build and install with no errors. When I try to restart apache I get... __SNIP__ Starting httpd: httpd: Syntax error on line 104 of /usr/local/apache-09192007/conf/httpd.conf: Cannot load /usr/local/apache/modules/libphp5.so into server: /usr/local/apache/modules/libphp5.so: undefined symbol: php__pcre_ucp_findprop __SNIP__ I am running php 5.2.2 compiled the same way with no problem. TIA, Adam