How to solve this problem ?

1. go to http://www.ioncube.com/loaders.php
download a loader package. For me I use linux as server then I download http://downloads2.ioncube.com/loader_downloads/ioncube_loaders_win_nonts_x86.tar.gz
2. use winscp for transfer file to server.
3. run tar -xzvf ioncube_loaders_win_nonts_x86.tar.gz
4. edit file php.ini
if you don't where file keep on, you can run find / -name php.ini It should be at /etc/php5/apache2/php.ini
5. add line below into php.ini
zend_optimizer.optimization_level=15
zend_extension=/home/surapong/ioncube/ioncube_loader_lin_5.2.so
zend_extension_ts=/home/surapong/ioncube/ioncube_loader_lin_5.2_ts.so

[Zend]
zend_extension_manager.optimizer=/usr/local/Zend/lib/Optimizer-3.3.3
zend_extension_manager.optimizer_ts=/usr/local/Zend/lib/Optimizer_TS-3.3.3
zend_optimizer.version=3.3.3
extension=pdo.so
extension=pdo_sqlite.so
extension=sqlite.so
extension=pdo_mysql.so

Hey, here is a youtube video showing a quick fix @ http://www.youtube.com/watch?v=off_yy_8180. Hope this helps.