Internal Server Error after upgrade to 3.8.4 PL2

[Telesik]

Hi. Iwas trying to unarchive my old forum, I extract mysql dump, copy all files from 3.8.4 PL2 installation and run upgrade.php script. Upgrade was successful, then I'm trying to log in to admincp and receive 500 error and this error goes at all pages.

[02-Jun-2011 02:52:06] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required 'x:\forum/includes/functions_threadprefix.php' (include_path='.;c:\Program Files (x86)\PHP\v5.2;x:\forum') in X:\forum\global.php(400) : eval()'d code on line 125

$config['Misc']['forumpath'] = 'x:\forum';

First time my forum was installed at *NIX, Apache and old version of PHP (~ver 4) and MySql (~ver 4.0) and now I'm trying to setup this forum on Windows 2008 R2 Server with IIS 7.5 + PHP 5.2 and MySql 5.1.

How to fix this issue? In php.ini I've put path and also did it in config.php (vbulletin) but this is not help me.

[Zachery]

Try adding

define("DISABLE_HOOKS", true); 

To your config.php file

[Telesik]

Thank you, this is help me. And what I must do next? As I understood, disable hooks is not good?

[Zachery]

Disabling hooks disables third party software, after you added that to the config file, are you still getting internal server errors?

[Telesik]

no, 500 error is gone, all ok now, thanks

[Zachery]

Check your plugins, it looks like one of them was calling a file that doesn't exsist.