OK, I don't know if this is the fix but this what happend
I comment the zend extensions at the end of php.ini file
./build ioncube
./build zend
restart Apache
(same problem)
Then
I comment the zend extensions again at the end of php.ini file
Delete both ZendGuardLoader.so and ioncube_loader_lin_5.3.so files
./build ioncube
./build zend
restart Apache
(it works)
Any body have an explanation or should I mark this as Solved