TRouble VNC

[rjmjr69]

I'm having troubles using mobile VNC viewer trying to control 3 different machines on the same network. I set each to have its own dedicated ip I forwarded the ports with different ranges. I can access the first one but non of the other

1. Port 5900 "Default" 192.168.1.17
2. Port 5901 192.168.1.8
3. port 5902 192.168.5

When I get the login screen I enter my ip say 125.123.124.11 just that gets machine number 1

So I would ASSUME I use 125.123.124.11:8 to get machine 2 correct? Doesnt work
Same on machine3

What am I doing wrong?