php install help

Hey guys, Im having problems getting my helloworld.php file to Work on the apache server. My phpinfo.php works perfect. I know the code is write The error message I get is ######################################################### Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, karl.james@verizon.net and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. ------------------------------------------------------------------------ -------- How can I correct this The linked I used is. Localhost/phpinfo.php And the one that is not working is Localhost/helloworld.php ultimatefootballleague.com/index.php karl.james@verizon.net