[function.copy]: failed to open stream: Invalid argument in ช่วยด้วยย...

  <?
if($hidAction == "Add") { 
$date = date("U"); 
if($thumbnails != "") {
$type = getimagesize($file); 
if($type[2] == 1) { 
$image = $date."_img.gif";
} else if($type[2] == 2) { 
$image = $date."_img.jpg";
}
copy($thumbnails, "../../../image/$path/$thumbnails"); //ก๊อปปี้รูปภาพไปยังโพลเดอร์
chmod("../../../image/$path/$thumbnails", 0777); //ทำการ changmode 
}