Did you aim the dish? The El/Az readings they give you are approximate. You'll still need to tweak the dish to get a reading.
A) Make sure your new mount is plumb. B) Set the El & Skew according to the chart. C) Set up your receiver to for satellite signal. D) Connect the dish to receiver E) Slowly pan back and forth. If you've gone +/- 45 degrees from the starting Az, adjust the elevation either +/- 1 degree and pan again. Continue searching until you've checked +/- 5 degrees elevation and +/- 45 degrees Az for each El change.