PHP 5.2 and Apache 2.2 are really compatible?

Dear All, I’m using Window XP operating system. I’ve just installed PHP 5.2.5 and Apache 2.2.8 over a week now. I’ve checked if Apache installation is okay with ‘localhost’ in my Firefox browser and it displays ‘It Works!’ But, my php code <?php  echo "<h1>Hello Web!</h1>"; ?> that I saved as ‘first.php’ in the ‘htdocs’ will not display “Hello Web! in my browser. In the ‘Review Error Log file’ I found: PHP Warning:  PHP Startup: Unable to load dynamic library 'C:\\php\\ext\\php_msql.dll' - The specified module could not be found.\r\n in Unknown on line 0 [Wed Oct 19 16:22:12 2011] [notice] Child 7728: Child process is running [Wed Oct 19 16:22:13 2011] [notice] Child 2016: Released the start mutex [Wed Oct 19 16:22:13 2011] [notice] Child 7728: Acquired the start mutex. [Wed Oct 19 16:22:13 2011] [notice] Child 7728: Starting 64 worker threads. [Wed Oct 19 16:22:14 2011] [notice] Child 2016: All worker threads have exited. [Wed Oct 19 16:22:14 2011] [notice] Child 2016: Child process is exiting [Wed Oct 19 16:22:14 2011] [notice] Child 7728: Starting thread to listen on port 80. I’ve checked my Apache and PHP configurations again and again. I’ve checked the information on the internet with more configuration info. I don’t know what else to do. Please I’m very new to PHP codeand Apache environment. I need your help. I don’t know what I’m doing wrong and what to do. Please please help. Joseph