Thank you for your message.
Host version - i tried on same machine 6.9 and 6.3
We do not recommend to use outdated versions, especially 6.3 which is already pretty old. If you use Viewer 6.9 please also use Hosts 6.9.
Installation works OK and i get ID no problems. Cant connect.
We need to look at the Host log. You can locate the Host logs in this folder C:\Program Files(x86)\Remote Utilities - Host\Logs. You can create a support ticket and send us the logs through the ticket. Please, do not publish the logs on the forum, they are considered personal information.
Looking forward to your reply.