Hi, I am hoping someone out there can help me with this problem. While on a service call for a mrv problem yesterday I arrived on site the customer said her h21 was not seeing her hr-23. Of course it was working perfectly when I was there. I checked the system everything looked good ran some tests everything seemed fine. I then swapped her 2 recievers for a H-25 and a Hr 24 just because her recievers were pretty beat up and was hoping that would fix it. She called me last night and its still messing up. There is no internet connection on this system. Any ideas? Thanks!