my dreambox works fine on sky sports 4 but sports 123 there is nothing just a blank screen, i though it could be the line but the line is perfect on my other dreambox 500s, the box has flip flops latest buquets installed , but some channels are blank and iv done a transponder scan and went through all the sky sports 123 service but still nothin, my other box is perfect exact same setup , but the other is playing up

both boxes are setup exactly the same
dreambox dm 500s chinese clones plz help