Am i ment to see DHCP server as well or only DNS server ?
You will only see DNS Server. The DHCP and DNS server share the same common service, so only 1 Server entry will appear in the Servers tab, DNS.
Did you do a refresh on your clients to obtain the DHCP lease. If it's Windows, from command prompt do:
If it's another OS, there are similar commands to make it work. As long as DHCP is checked in the Network, Settings area it should be working.
If you are still having problems, recommend you try the Network Troubleshooter.
https://wiki.amahi.org/index.php/Networ ... leshooting