Unable to add cookies, header already sent. includes/class_core.php

[khaales]

hi
some one help me please

when i upgrade to VB3.7 my admincp is not open and it shows me this error:

Unable to add cookies, header already sent.
File: .../public_html/forum/includes/class_core.php
Line: 3237

and show me in the top of page this:

Warning: include([path]/includes/vb_ad_management/cache_templates.php) [function.include]: failed to open stream: No such file or directory in [path]/global.php(365) : eval()'d code on line 63

Warning: include() [function.include]: Failed opening '[path]/includes/vb_ad_management/cache_templates.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in [path]/global.php(365) : eval()'d code on line 63


what can I do
help me please