if (move_uploaded_file($_FILES['upfile']['tmp_name'],"C:/Website/dep_c/2010-05/aisheyingstudio/images_upload/20100603062051.jpg"))
{
   echo "<script> alert('文件上传成功!');window.location.href('pto.php');</script>";
}else {
   echo "<script> alert('文件上传失败!');history.back();</script>";
}怎么老是上传失败?