I have a Nokia STB and I am not having any problems but I know several people who have Phillips STB's every so often they get Cannot Validate Card but this only happens on SKY channels but if you powerdown the box and reset you can watch all the other channels again except SKY prefixed Channels. If I re-program the cards again they seem to be OK for a few days. I have tried the Kevlar codes and the DBMG2 codes and they both have the same problem.
![Mad :mad: :mad:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)