I am on Uniform Server 11.1.15. I have PHP versions 5.3 and 5.4 loaded and switch between them, but normally use PHP version 5.3. I try to enable the php_pgsql and php_pdo_pgsql extensions, but when I start Apache, I get the following errors: PHP Startup: Unable to load dynamic library 'C:/Users/John/Desktop/UniServerZ/core/php53/extensions\php_pdo_pgsql.dll' - The specified module could not be found. PHP Startup: Unable to load dynamic library 'C:/Users/John/Desktop/UniServerZ/core/php53/extensions\php_pgsql.dll' - The specified module could not be found. I checked the physical directory where the error message is referring to and the modules are, in fact, there. Can anyone give me an idea of how to get Uniserver to activate them?