I also am having no luck with mcrypt. When I "uncomment" the line in the file xampp/apache/php.ini and then stop/restart using XAMPP basic start/stop
I get the message
This application has failed to start because libmcrypt.dll was not found. Re-installing the application may fix this problem.
Unknown(): Unable to load dynamic library 'C:\programs\xampp\php\extenstions\php_mcrypt.dll' - The specified module could not be found.
The file 'C:\programs\xampp\php\extenstions\php_mcrypt.dll' is where it is supposed to be. I cannot find the file "libmcrypt.dll "
The messages then repeat again.
I have also tried editing the php.ini file in the php directory also, with no luck.
In the german language forum there is a post that may (I don't read german) be suggesting that I need to re-compile php using "-with-mcyrpt".
Any help would be appreciated.