I put in the latest (as so far said in this site..) Pansat Keys [1/ 77-c4-b3-74-e0-6b-15-28] and they dont work. I have Pansat 2500A. I turned it off from the back and still it says on all the channels I switch to "Scrambled or bad channel" and also "Please wait for picture." Can anyone help me? Please and thank you.