All four of my receivers were OK when I went to work today. When I returned, both DP301 are flashing error 005, not authorized. I called support and went through two levels and they tell me that both DP301 are bad and need to be replaced with 311. Hard to believe that both DP301 (one is a 301D and the other is a 301E) fail at the same time with the error. My VIP 222 and 211 are still working OK. Should I ask for VIP211 replacements instead of the 311?