The method you are using to access the file is not allowed.A request was made of a resource using a request method not supported by that resource;for example, using GET on a form which requires data to be presented via POST, or using PUT on a read-only resource.

HTTP 405 errors relate to particular objects on a web site, whereas HTTP 501 errors occur when a method is not allowed throughout a site. The method specified in the Request-Line is not allowed for the resource identified by the Request-URI. The response MUST include an Allow header containing a list of valid methods for the requested resource.

You may be attempting to run a script that is not supported. Some ISPs do not allow scripts on their servers, which could result in this status code. If you are monitor your website through 100pulse, we will intimate whenever you encounter 405 status code error through e-mail or Short message service.