Thread:Project:Support desk/ParserFunctions installation issue - Windows / IIS7

Mediawiki 1.19.1 PHP 5.4.5 MySQL 5.5.27 IIS 7.5

I am having issues installing ParserFunctions extensions. As soon as the extension is added to LocalSettings navigating to the wiki will result in the following error:

PHP Warning: fopen(C:\inetpub\wwwroot\mediawiki/cache/l10n_cache-en.cdb.tmp.1011707164): failed to open stream: Permission denied in C:\inetpub\wwwroot\mediawiki\includes\Cdb_PHP.php on line 278

I've noticed that the fopen path contains a mixture of back and forward slashes. If this is the issue, how do i change this??! I've also given \cache write permissions in case this was the issue.

Any ideas??

Dom