I can use AEMpro and it always connects. But when I try Aemtuner (every version I have tried) I get this screen pop up and then no go...

I have tried serial first, USB first, and it only happens when I hit connect to ECU. Once it says "an ECU is found but can't connect, try rebooting." but nothing is working. I have reinstalled .net, aemtuner (numerous times and versions), and nothing seems to make it work.
Any thoughts?
-Garrett
please contact me as soon as a solution can be found.