Problem at the entrance to a subject

[محروم.كوم]

Hello, the problem is in the file: class_postbit.php.
When I go to a subject I have written a message: Unable to add cookies, header already sent.
File: / home / ariel / domains / mgf.co.il / public_html / includes / class_postbit.php (294): eval () 'd code
Line: 1
This problem is that I can not expect the issue, did not respond to absolutely nothing.
Wish you would tell me what the problem is the following code as specified system errors: ($ hook = vBulletinHook:: fetch_hook ('postbit_display_complete'))? eval ($ hook): false;

I'd love to help
Thank you very much. __DEFINE_LIKE_SHARE__