Lately my Dish 6000 (w/ 8VSB and 8PSK modules) suddenly will give me an on screen message that says something like "your smart card is no longer eligible to recieve this programming" or "please reinsert your smartcard". Then the screen goes blank. If I pull the card and reinsert it, the picture comes back. Any ideas about what's causing this? I am current in my payments to Dish so I don't think it has anything to do with non-payment.