Hi, thanks for your reply. I have asked on technical support and they told me that. I am very unhappy with this hosting, they lie about unlimited domains... and sometimes my sites are loading in minutes.... Anyway I will try to find if I could activate ionCube myself but I have serious doubts. The only good thing on Hostgator is the support...

Hmmm, very strange, I have look in Joomla Info and I have found this:
"This program makes use of the Zend Scripting Language Engine:
Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
with the ionCube PHP Loader v4.0.8, Copyright (c) 2002-2011, by ionCube Ltd., and
with Zend Optimizer v3.3.9, Copyright (c) 1998-2009, by Zend Technologies"
that is not like ionCube is installed?