Cannot load libphp4.so : undefined symbol: ap_block_alarms

Hello, I am trying to get PHP-4.2.3 to work with Apache-2.0.40.... it seems I am not the only one to be struggling with this I have managed to follow the instructions on the php.net web site so far, I ran ./configure --prefix=/net --enable-module=so make make install to install apache, and it all works fine. I then continued to add php cd ../php-4.2.3 ./configure --with-mysql --with-apxs2=/net/bin/apxs make make install and this also completed without error, however libphp4.so is not in the default libexec as the instructions said, I found it in /usr/lib/apache/ so I added to httpd.conf LoadModule php4_module /usr/lib/apache/libphp4.so As I ran into trouble I have also added <Files *.php> SetOutputFilter PHP SetInputFilter PHP </Files> Now I am completely lost and restarting httpd returns the error:- Syntax error on line 232 of /net/conf/httpd.conf: Cannot load /usr/lib/apache/libphp4.so into server: /usr/lib/apache/libphp4.so: undefined symbol: ap_block_alarms [ line 232 is:- LoadModule php4_module /usr/lib/apache/libphp4.so ] Help !