Thnks for your reply guys.about the dish,<br />I didn't touch anything the dish was working fine just I pressed channel mapping in the remote control then everything is gone. I had a group of channel which I like them mostly were arabic channels. the dish still is the same direction as the tarbs technician did it.So the problem is the decoder. another thing if this wont work again what do you suggest?, is there any cheap and good decoder that I can setup easily.