If there is a 721 that has a blue card and has not been active for a while with old software, is it possible to get it activated with a yellow card? The reason why I ask this is due to the fact that earlier this year I tried to get Dish Network to activate a diferent card than what came in a receiver and they said they could not change the card unless the receiver has certain software which is only one or two software versions back. Can it be done with the blue card for the software update before putting the yellow card in? I think thats how they done it with the other receivers before. I was going to buy a 721 with the blue card and wanted to make sure it could accept a yellow card. Thanks.