You'll have to use either an Irdeto hardware cam (card label down) in either of the two common interface (CI) slots (TV-Plus use Ird 2) or a suitable softcam installed and activated appropriately. Don't forget to re-initialise the cam after you have inserted the card.
Try using the SEARCH button on this forum.
There is also plenty of information regarding softcams etc. on the 'net - in particular try the Dentenk forum (Google is your friend).
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