Can't use XMPPHP (Google code)

Hi,

I use
- Linux 2.6.18 on Red Hat Enterprise 5.6
- x86_64 machine
- PHP 5.1.6
- ejabberd 2.1.6

The XMPP server works great but i can't connect using XMPPHP (http://code.google.com/p/xmpphp/)

I try in other OS (Mac OSX and Windows) both with ejabberd (same version and same configuration) and XMPPHP works without problems.

Please, help me.