Assuming that you were using the box to watch encrypted channels without a subscription, the Conditional Access system (Nagravision1) has been replaced by Nagravision3. This means that boxes that could get around Nagravision1's encryption do not work any more.
There is no fix to this and no prospect of a fix because unlike Nagravision1, Nagravision3 has not been compromised is is unlikely to be in the near future.
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