[W8.1]WNS notification - 404 Error

Question

I use php.  push Notification

I am trying to push notifications to my windows app via WNS,

I get a 404 response everytime.

I have verified that the Channel URI is valid, because every time I launch the app, I get the channel URI and use that immediately for testing.

I tried  Project->Store->Associate App With the Store everytime.

but  I still receive 404 response everytime.

Windows Store App needs to send authentication is completed in windows Dev Center ?

But I just wanted to test success.

My Server PHP Code :

function Send()
{
$_WPN = new WPN("ms-app://s-1-15-2-xxxxxxxxxxxxxxxxxxxxxx", "Dx56rxxxxxxxxxxxxxxxxx");

$_build_tile_xml = $_WPN->build_tile_xml("test","ms-appx:///images/Img.png");

$_WPN->post_tile( "My_PC_channelUrl", null, 'wns/toast');
}

public function build_tile_xml($title, $img){
        return '<?xml version="1.0" encoding="utf-8"?>'.
        '<toast launch="additionalContextParameters">'.
          '<visual lang="en-US">'.
            '<binding template="ToastImageAndText01">'.
              '<text id="1">'.$title.'</text>'.
            '</binding>'.
          '</visual>'.
        '</toast>';
    }
	
    public function post_tile($uri, $xml_data, $type = WPNTypesEnum::Toast, $tileTag = ''){
        if($this->access_token == ''){
            $this->get_access_token();
        }
		
		$headers = array('Content-Type: text/xml', "Content-Length: " . strlen($xml_data), "X-WNS-Type: $type", "Authorization: Bearer $this->access_token");
		
        if($tileTag != ''){
            array_push($headers, "X-WNS-Tag: $tileTag");
        }
		
        $ch = curl_init($uri);

        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_POSTFIELDS, "$xml_data");
        curl_setopt($ch, CURLOPT_VERBOSE, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        $response = curl_getinfo( $ch );
        curl_close($ch);
    
        $code = $response['http_code'];

        if($code == 200){
            echo 'Successfully sent message'. "<br>";
            return new WPNResponse('Successfully sent message', $code);
        }
        else if($code == 401){
            echo '$code == 401' . "<br>";
            $this->access_token = '';
            return $this->post_tile($uri, $xml_data);
        }
        else if($code == 410 || $code == 404){
            echo 'Expired or invalid URI ' . $code . "<br>";
            return new WPNResponse('Expired or invalid URI ', $code, true);
        }
        else{
            echo 'Unknown error while sending message ' . $code . "<br>";
            return new WPNResponse('Unknown error while sending message', $code, true);
        }
    }