Skystar2 HD USB and HD Channels probleme ?

[night_wolf1619]

im new user of this card Skystar2 HD USB i was using Skystar1 only SD channel now i change to Skystar2 HD USB

my first probleme is the HD Channels when scaning only few channels are ok all other are lost
when scaning manually i gete them
when i change channel from HD to SD its OK but When i change from SD to HD no thing i must click many tim in thise channel to get it

so is there any Solution for this probleme

i use laste ver of dvbdream and last driver 4.6.0
and for info i have not thise probleme with other dvbplayer