Posting Error

[Mariner1]

When trying to submitt a post i get this error

Warning: require_once(includes/functions_ghsom.php) [function.require-once]: failed to open stream: No such file or directory in [path]/includes/functions_newpost.php(474) : eval()'d code on line 5

Fatal error: require_once() [function.require]: Failed opening required 'includes/functions_ghsom.php' (include_path='.:/usr/local/php52/pear') in /home/clubacts/public_html/includes/functions_newpost.php(474) : eval()'d code on line 5

Any ideas how to fix this pls

[Lynne]

That is from a modification. Try disabling your modifications/plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

define('DISABLE_HOOKS', true);