To make sure that your ADS.ini has the correct server IP address you must ping the server name in the command prompt:
Ping servername (enter) – where servername is the name of your server.
If you get a standard IP number pinging (for example 192.168.1.1) then you are running IPv4. If you get a longer more obscure number you are likely running IPv6.
The ADS.ini file will not understand the IPv6 address so you must re ping the server to get the IP in IPv4. You do so like this:
Ping servername -4 (enter)