I'm maintaining a Joomla 1..15 website as well as for a mystery reason now get the following error after i attempt to access the "Manage Contacts" section under Components -> Contacts:

Warning: require_once(/home/amscus/public_html/administrator) [function.require-once]: unsuccessful to spread out stream: Success in /home/amscus/public_html/administrator/components/com_contact/admin.contact.php online 25

Fatal error: require_once() [function.require]: Unsuccessful opening needed '' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/amscus/public_html/administrator/components/com_contact/admin.contact.php online 25

This started to fail about last month with no changes were happening using the site in those days. Any ideas of the items to check out, modify, etc. could be appreciated as I truly do not know what's wrong. Files and permissions all look correct. I suppose this really is some kind of file corruption but nothing seems incorrect. Thanks!

It might assistance is you published line 25 out of this file: /home/amscus/public_html/administrator/components/com_contact/admin.contact.php