Probably one of two options,
Option 1 You are using the wrong net id, it is not always the one closest to you,
Try, restore to factory default settings, delete all the channels and rescan on another net id.
Then repeat until you get a full channel list. ( I am in liverpool but scan out of Manchester 2)
lots of other net id's closer but don't give me a full list.
Option 2
They are messing with the kryptview server, and channels come and go.
Usually if SS2 or another popular channel is missing someone will moan about it
being missing and others confirm they don't have it too, then we know its this option.
The channel will just re appear if it is this as the box scans for channels whilst on standby
As you have just got up and running try a few different net ids, it won't damage the box.
The server has been hit and miss the last week or so.:)