Here are the results of the test script:

SEF Advance system test
This script will check if SEF Advance will work on your site. The results are displayed in green, orange or red color.
If some of the results are not green please follow the instructions and run this script again.

ionCube Loader
Status: Installed: version 3.1.22
Instructions: No additional configuration required.

Server Software
Status: Apache
Instructions: You must run Apache web server. SEF Advance doesn't support IIS.

Additional Information
PHP Version:   4.4.4 (cgi-fcgi)
Operating System:   Linux
safe_mode:   Disabled
enable_dl:   Enabled
PHP as CGI:   Yes
Server name:   *****
Server IP:   *****
PHP info:   Click here

Please make sure that you can run built-in SEF before installing SEF Advance. This will ensure that your server supports .htaccess override and mod_rewrite.
Read Frequently Asked Questions for more information.

I am running other components that require ioncube without any problems.

Any thoughts?

I installed and enabled SEF Advance 2008 on Joomla 1.5.4, but all pages are completely blank. Page source is blank as well. No error messages or codes.

Core SEF with mod_rewrite works fine. All other requirements posted on your website are met as well. The pages are just blank. I tried running with and without core SEF enabled, also adjusting settings... no changes.

Thanks.