I'm having problems using ADTPro via null-modem serial link. I have installed it on both MacOS and Windows 10. I also have two Apple IIes. One enhanced platinum and one non-inhanced. They each have their own serial cards. I configue the cards with the block pointing up and the switches as shown in ADT's site. I also do the IN# of the slot and get "Apple SSC" and enter the correct number. When I run the software on both the Mac and Win10 it starts to send the data and the light on my data cable blinks showing it is sending data. The progress on the server says it's sening data. I get no response from the Apples and nothing appears on the screen after starting the send. The server says the data sent and completes. I believe both cards are working cards as I use them as printer cards with no issues.