#9 Cant get decrypt to work

[Anonymous]

Hello, I am trying to get mcrypt to work on WindowsXP
with IIS and PHP 4.3.4.

These are the instructions I found in the readme file, and
I followed them.

libmcrypt + php 4.3.x on windows

Copy libmcrypt.dll into a folder that is in your system
path
(c:\winnt\system32, for example).

Make sure that you extension_dir php.ini option points
to the correct location. For example:

extension_dir=c:\php\extensions

Uncomment/add line extension=php_mcrypt.dll in your
php.ini

I've tried many examples I found in the Internet. They
work for encryption but the decryption part throws a pop
up window with a memory reference error, instruction
0x6c18701d in the memory reference 0x00000050. The
memory cant be read.

I need some help