I have 2 tanks connected to my Cerbo, on the VRM portal the tanks levels can be seen, but not on the GX touch. When I go into device list it says they are disconnected, when I go into each sender it says the status is disconnected. when I go into the device it says it is connected. I have updated the system, I have been into the setup and turned them off off and back on again. The sender are obviously working because the info is on the VRM. Any ideas where to go next?