Blank Front Page

Greetings, My website has been working fine with your Corporate 2. Since yesterday I am getting a blank front page.
The address is http://www.faan.og.ao, the back-end is fine, but the front page does not work.
I have cleared the cache, disable some modules, still not working.
Please help!!!
Thanks

PS: I noticed that if I remove the index.php in the templates/gk_corporate2 folder, i got a plain joomla page display. when I put an index.php (from my offline version)in, the same error appear.
Regards,

Hey I would like to help you ou5. Firstly you should not remove or change any of your index files..If you would like to give me access (admin and FTP) I can take a look at this for you

Firstly you should check your server error logs and enable display errors option to find the source of this problem