php Installation problem

Hi Friends, I have problem in installation of php in windows 98 + PWS.I have followed all the instructions in install.txt.But still i get HTTP 500 Internal Server Error.Please Help me Thanks in advance With Regards Santhanam -------------------------------------------------------- Operating System : Windows 98(Second Edition) PHP Version : 4.0.4pl1 Running as Server Module(ISAPI) --------------------------------------------------------- Code : <html> <head> <title>Example</title> </head> <body> <?php echo "Hi, I'm a PHP script!"; ?> </body> </html> ------------------------------------------------- Error : HTTP 500 - Internal server error The page cannot be displayed There is a problem with the page you are trying to reach and it cannot be displayed.