Multi WAN Port Forward Issue

[Jaymei]

Forgive me if this seems trivial however I can't seem to get this working the way I need.

I have moved from Watchguard and a network with a few different WAN IP addresses.
Now I assume that I add the additionals as Virtual IP and work from there, however, I run 3CX and RemoteApp on my network and cannot seem to get things working properly.
The port forwards does not seem to work and all guides I have found don't seem to be what I am looking for.

I have tried forwarding the ports to the Virtual IP but it does not work.
Any help would be appreciated or if more info is required happy to give.