sorry I am not experience
can U explain please ?
make a simple
test.php file and add to the forum folder and visit forumURL/test.php in your browser
test.php file content can be like below
<?php
echo "php working";
?>
that is appear now
http://www.ptc-refrepaid.com/forum/
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the related configuration data for the page is invalid.
There is an error in your IIS configuration. Unfortunatly there are almost no IIS users here so you may have to look for support somewhere else.