Not sure mate but have a look on some of the "Test" or "Data" or "NVOD" channels, just have a look around, its probably being broadcast on a channel which is in a hidden bouquet or something like that.
And for the NVOD channels, find the channel number in the Webinterface, and see whats showing on that channel. If you just tune to an NVOD channel with the box then 9 times out of 10 it will show a blank screen, when theres actually something playing.
Liam.