Hi, I have a vip722 and trying to setup dual mode. I have the triplexer hooked up and everything works on tv1, tv2 works and is set to channel 62. It shows what ever is on tv1. When I open the front cover and hit mode to switch from single to dual mode it says this feature is currently not supported. Error code 863. I hit ok and it takes me to multimedia where I can move dvr recordings to a external hard drive. I have done a factory reset and everything I can think of. Please help. This is a new box and I have never had it working in dual mode before. Thanks