Help, after EISY update to 5.9.1. have lost all communications with insteon devices other than a handshake in communications log. always errors when writing updates to devices. I have tried a brand new modem. EISY sees modem and updates it. But when it goes to update other insteon devices just gets a ack from them that's it. I have had to replace the modem on the eisy before and never had a problem. Also have done the same with my isy994. I did verify my modem works as I used it with my isy994 to test it. So i am convinced i don't have a modem problem. I have a small network of only 15 devices all are located within 1500 sq feet. and prior i never had any latency in communication.