Triple tuner help

dm800se sr4 triple tuner newnigma2 image.
when I do a scan on c tuner with uk bruteforce it picks up 534 channels and all channels are clear with no problems but missing about 80 odd channels mostly hd and international channels. With cable uk scan finds all channels but the picture glitch (as it does when signal gets low) but my signal is at 68% i don't know what i am doing wrong can some one help me please.

hi
i tried my box at my brothers house he is with virmin media my box still shows 68% but my brother using virmin box he does have all the channels i have done a fresh scan at his place with no happy ending. if it was signal problem i should have get fta channels but all the channels glitch hd & sd. Asian channels are not hd i think it have something to do with the software i was watching dbox2 before nag3 with no problem.