Channels from a given transponder are not listed...

Hi everybody,

I've an Amiko Alien 8900. Some of the channels from a given transponder are detected and I can watch them without problems. However, there are some further channels from the same transponder that are not detected/listed, and therefore I cannot watch them. Any clue about the reason?

Cheers,

Tiago

Additionally, there are some transponders that are supposed to list channels, but they cannot detect any... This is only another issue that can contribute to the main idea exposed on the previous post...