had the same problem many times. i always just ended up sayin f***- a dish 1000 and put a 500 and a 300 up, DONT try to use a dish 500 for the 129, make sure its a 300. a 500 with a single gets s--ty as well. hope this helps.
This is CABL.com posting #182043. Tiny Link: cabl.co/mVwl