when alinging dish 1k 4 to 72.7w I got a strong signal and thought ok, but the receiver displaye sat 82. Now when I go to point dish sats 72,7 and 77 dont appear, only 82, 91.129. I belive 61.5 is still their. I tried check switch twice but only got a message that there was a installation problem, not the usual save or cancel choice. How can I reset the receiver. Will I have to lock in on 61,5 and then do a check switch? I am in eastern Long island NY El 41.6 mag 194 skew 91