Using Veyon 4.5.2 with TightVNC 2.8.27

[Michael Allen]

I am attempting to connect to some computer that have TightVNC on them. Port: 5900
I have turned on loopback as I saw in a previous post that without it I could have issues connecting. I have added the PC and it's IP address in the configurator and I have checked off External VNC server and put in the port number, 5900. The password here I have tried both the admin and the login password for the tight VNC server however both give me the same result, computer offline or switched off. Are there some more settings I need to change or am I unable to use tightVNC with Veyon? Any help would be appreciated. Thanks.