posgres 7 functions not working with PHP4

I've just built Apache 1.3.17 on Free BSD, using php-4.0.1pl2 and linking with the postgres 7.0.3 as a shared object. I also linked in mySQL support, which works correctly. When I try accessing the posgres database by calling pg_Connect(), my web server doesn't even display a page, other than "this page cannot be displayed" (in IE) or "page contains no data" (Netscape). The error log displays: (null): Undefined symbol "_PQsetdbLogin" called from httpd:/com/apache/libexec/libphp4.so at 0x8256498 1) Why isn't the function call resolving? It appears to be in the postgres library. 2) What's with the format of the error message? There isn't a date or error level field. I'm guessing the error occurred somewhere very early in the Apache parsing process. Does Postgres 7.0.3 work with PHP 4? thanks