Error code 405: while Uploading file(NSData) With NSURLSession with uploadTaskWithRequest

I am trying to upload file to server location which is like this :

urlString : http://uploads.myLocation.com

Its is coming up as status code 405 - which means "Method not allowed". Do I need PHP script as suggested on last answer of this link ? ios Upload Image and Text using HTTP POST

How do server understand what I am sending? Is it any work for me as an IOS developer or its server side issue?

class func uploadTask(urlString: String, withDataString : String) {

    print("URL To Upload :(urlString)")

    if let percentURL = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())
    {



    let url:NSURL = NSURL(string: percentURL)!
    let session = NSURLSession.sharedSession()

    let request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"
    request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringCacheData


        let data = withDataString.dataUsingEncoding(NSUTF8StringEncoding)


        print("Data Length :(data?.length)")

        let task = session.uploadTaskWithRequest(request, fromData: data, completionHandler:
        {

            (data,response,error) in

            if error == nil
            {
                print("Response :(response)")

                let httpResponse = response as! NSHTTPURLResponse

                let statusCode = httpResponse.statusCode

                print("Status Code: (statusCode)") 


            }
            else
            {
                print("Error Uploading Data :(error)")

            }



        }
    );

    task.resume()

}
}