starview pvr missing channels

[steady--1]

I have the starview pvr, all was ok upto about 2-3 weeks ago, I lost some of the discovery channels, virgin 1 and cnn there may be one or two more that I dont know of as well
I tried rescanning with auto scan, have done a factory reset and auto scanned, it does not seem able to find some channels as I now only have the discovery realtime channels, the other discovery channels aren't found and niether is cnn
my sons kryptview box picks up all channels so this appears to be just the starview pvr playing up
any help greatly appreciated

[Jonpc]

Did you delete the channels first before doing an auto scan.

[steady--1]

I did a factory reset and the box went to select language, then I scanned and then turned auto update on so as to decode channels