Site not working anymore

[Cristelle]

On my site : http://videos.summer-glau.net/

I get this error message since Monday:

Fatal error: Incompatible file format: The encoded file has format major ID 0, whereas the Optimizer expects 2 in /home/glauvids/public_html/index.php on line 0

We haven't touched anything, can someone tell me how to get the site back???

Thanks

[buyscripts]

(1) It seems you are using the out of date version of Zend Optimizer.

Contact your webhost to update the Zend Optimizer to latest version

(2)Reupload the index.php in binary mode and check

(3)If you can't get it fixed, submit a support ticket at BuyScripts Helpdesk

[admin]

Your web host upgraded PHP version causing the problem. Latest version of vshare do not use Zend Optimizer. You should upgrade to latest version of vshare to fix the problem.