Thread:Extension talk:ParserFunctions/Installation Issue

I've installed the ParserFunctions and PipeEscape extensions into their respective folders ($IP/extensions/ParserFunctions & $IP/extensions/PipeEscape) and added the relevant requisite code to the LocalSettings.php file along with creating and copying the code for the ExtensionFunctions.php file in the $IP/extensions folder. I'm running MediaWiki 1.13.3, PHP 5.2.8 and MySQL 5.0.67.

My issue is that I still see a plain text version of my magic words rather than the functionality it is supposed to evoke. I've attempted re-installing the extensions, checked that they were for the right version of MediaWiki and moving the location of the extension. Are there any other things I can try?

Thank you,