pgsql_php extension issue (windows)

I have installed Apache 2.2.11/Postgres 8.3.6/PHP 5.2.9. I am getting the following issue when loading php on the apache server <<<<<<<<PHP Warning: PHP Startup: Unable to load dynamic library '.\\php_pgsql.dll' - The operating system cannot run %1.\r\n in Unknown on line 0>>>>>>>> I've copied the extensions I'm loading to the root php directory, then changed the extension_dir in php.ini to ".\", so that's why the path is just ..\\php_pgsql.dll . I've also added the root php dir to the path e.v. I have no trouble running a php script with apache, so long as it doesn't include any pgsql functions. Finally, and MOST IMPORTANT, when I run my php script using the command-line php.exe, it connects to my pgsql database and retrieves records just fine. So the problem is in the way that apache loads php, and not in the way that php loads the extensions. I've googled furiously for the fix, but haven't found any solution. Also, I've tried a fix suggested by somebody where you add the postgres bin directory to the path, but no joy.