PHP 4 cgi upgrade problem

Hello, We have a problem with running php4 as the cgi handler for php requests. Our setup was RH6.2/i586//Apache1.3.3(compiled locally) using PHP4.0.1pl2 as cgi(compiled locally), with the .htaccess looking like: <snip> AddType application/x-httpd-php .php .php3 .php4 .phtml AddType application/x-httpd-php-source .phps Action application/x-httpd-php /cgi-bin/php4 Action application/x-httpd-php-source /cgi-bin/php4 </snip> when we installed 4.0.3pl1 executable(with all the same options), all the php scripts say only one thing: Parse error: parse error yada yadda in <b>/cgi-bin/php</b> we replaced the 4.0.1pl2 executable (the libraries for 4.0.1 & 4.0.3 are in seperate directories, and both are configured separately). everything works as before with the older version. i'm stumped. can anyone help? TIA, Hrishi