cast128 php class does not work
===

I found this class at phpclasses.org

http://www.phpclasses.org/package/1983-PHP-A-pure-PHP-CAST-128-encryption-implementation.html

I run into my personal server and it works perfectly. I run test() function and it returns true. My friend tried to run the same function (test()) into his personal server and it returned false.

I don't know what is missing. Can you me explain why?
In the documentation, the developer only says: 

> Run a test to ensure that the script is working properly: Uses known
> values to ensure that the script is able to implement that CAST128
> algorithm. $example->test(); Returns true if it succeeded, false if it
> failed.

Thanks in advance.
Hugs.