I have a dish on roof with DirecTV. ( model# ODU-KA/KU3 ) and this dish works good with my receiver in garage/cellar. ( HR-21-700 ) so any way I used to go camping & set up my round dish no problem. We stopped camping for 3 years. And now it's the high definition revolution. So I got a new portable dish for the new receiver we have (SL5S ) I can't get this to work, I get either no dish 775 error or no swm signal 771 error. This is so complicated. I'm going to order a set up signal meter. But there's another problem I'm missing with set up. Shouldn't I get a weak signal at least, if I'm not aiming dish correctly? Dish on house that works good mod. no. ODU-KA/KU3 new portable dish no. SL5S and receiver by television system mod.no. HR-21-700 is this dish portable dish compatible? Sat pros say it is. They are unavailable till Wednesday