Control Center - setting port numbers

[gthms 0]

I am trying to connect to multiple DVR's remotely on one site using Control Centre software which I just bought. All Geo 1120, Ver 8.01. I can connect to the one with the default port numbers with no difficulty.

 

However when I try to change the port numbers on the other machines the menus are grayed out in the network settings section, and it does not allow me to change the port numbers.

 

I am logged on as administrator.

 

I know I have probably missed something obvious.

 

Any help appreciated

[CollinR 0]

Are you saying this happens when you try to change the ports on the server (DVR #2+) or when you try to change them on the Control Center system?

[gthms 0]

On the DVR