Forum PHP error and firewall blocking

[p8rpp]

I just tried posting to this forum and got the following error:
Not Implemented
GET to /cdpforum/index.php not supported.
Additionally, a 501 Not Implemented error was encountered while trying to use an ErrorDocument to handle the request

upon retrying several times I got blocked by the provider's firewall.
Your connection to this server has been blocked in this server's firewall.
You need to contact the server owner for further information.
Your blocked IP address is XXX.XXX.XXX.XXX
This server's hostname is cpanel07.myhostcenter.com

[simonk]

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