I sounds to me as though the new Conditional Access System (nagravision3) has just kicked in.
If you were watching encrypted channels for free then I am afraid that the game is up. If that was the case then there is no fix. Your box just will not decrypt N3 and probably never will be able to.
T, August 2010
Make and model of box, please.
Then.....Actually, you could do all this yourself: Go and find the manual (Hint: try manufacturer's website - Google is your friend, used properly)
