NO signal on 121 and 110? You've eitehr got a short tree on one side blocking, and a tall tree on the other, or your SKEW is not set correctly.
MENU-6-1-1 to the signal meter, and get the angles for your zip code. Tehn Check your settings. SKEW is the backplate, Eleveation is the gradient marks on the side(up/down), Azimuth is the whole dish(left/right). I'm guessing that either 1) your skew is not set right, or 2) your elevation is not set right.
If you have a portable signal meter, hook it up to the right port on the FEED LNB(the one covered by the plastic housing). That's the 119, which is the satellite in the middle of the lineup. If all your dish settings are correct, you shoud be able to peak in the 119, adn get the otehr two birds at the same time.