Problema subiendo imágenes a servidor externo, ayuda necesaria

$url = 'http://www.EJEMPLO.com';
   
 $params = array(
				 'categoria_id' => '343',
				 'subcategoria_id' => '386',
				 'provincia_id' => $provincia_id,
				 'localidad_id' => $row['A'],
				 'title' => $titulo[0],
				 'description' => $texto_mensaje[0],
				 'price' => '0',
				 'login_email' => $email[0],
				 'login_password1' => $password,
				 'login_password2' => $password,
				 'photo_1' => '@ruta_de_mi_imagen.jpg'
);
   

   $user_agent = "Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)";
   $ch = curl_init();   

   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
   curl_setopt($ch, CURLOPT_URL,$url);
   curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);


   $result = curl_exec ($ch);
   curl_close ($ch);
   print_r($result);
   print_r($params);

$url = 'http://www.mp3xd.com/test.php';
   $user_agent = "Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)";
   $ch = curl_init();   
   curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: multipart/form-data'));
   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
   curl_setopt($ch, CURLOPT_URL,$url);
   curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);


   $result = curl_exec ($ch);
   curl_close ($ch);
   print_r($result);