Need Software D2h Hd setup box..

[ubnt]

i have a problem when i open sd channel on my decoder very well watch when i drag a hd channel my stb black a screen like that no work hd channle and hang with other option when i restart my decoder so very well so plz help
me what a problem ...So plz tell me step by step...thx in advance.....

stb Info
Boot: 3.2
Loader: v1
download id:40
os Version: LINUX R678
Aplication 1442/1442.0044
custom version:7111.7.1442.2