Error Messages Generated by Mod Security.
Quote:
While these Error Messages may vary - The emphasis is on "An appropriate representation of the requested resource" to identify the possible cause.
Thanks to Zuker for the solution.
Open:
Your Forum Root: > .htaccess file.
Add: (Either at the very top or bottom).
Code: [Download] [Hide] [Select]
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
Note: You would be well advised to contact your ISP to try to fix this problem, as Mod Security is there to help protect your Site.