SEF ADVANCE generate: 500 Internal Server Error

Hi all,
from yesterday, our web site has been down beacuse SEF ADVANCE 2008 did not work property.
In fact if I uninstall SEF ADVANCE, the web site works correctly.
If I install last version of SEF ADVANCE , it appears a error message: INTERNAL SERVER ERROR.
Also in the backend, when I surf in the SEF ADVANCE panel, it's all ok. But if I click on About button, the INTERNAL SERVER ERROR message appears !!
I've regular buyed this product and I would like to have assistant in order to solve my problem !

The web site configuration is:
PHP:   Linux SRV-HS1.netsons.net 2.6.18-164.6.1.el5 #1 SMP Tue Nov 3 16:12:36 EST 2009 x86_64
Version database: 5.1.40-community
Collation Database: utf8_unicode_ci
Version PHP: 5.2.11
Server Web: Apache
Server web interface PHP: cgi-fcgi
Version Joomla!: Joomla! 1.5.15 Stable [ Wojmamni Ama Mamni ] 05-November-2009 04:00 GMT

This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
    with the ionCube PHP Loader v3.3.1, Copyright (c) 2002-2009, by ionCube Ltd., and
    with Zend Optimizer v3.3.9, Copyright (c) 1998-2009, by Zend Technologies
    with Suhosin v0.9.29, Copyright (c) 2007, by SektionEins GmbH

I think the problem is related to Version PHP: 5.2.11 becuase until November 10th 2009  the Version PHP was 5.2.10.

Hi,
is it the same with the ioncube loader 3.3.5 ?

maybe not.
But it's good if Sakic gets our answer

Hi, you should try the 3.3.7 loader

My answer is the same: Update your ionCube loaders.