Ok, i think your right, I tried to ping the name of the pop server and I didnt get any reply but i did get a reply when i ping the ip address of the pop server.
Here is the setup of how pc is connected to the domain controller: ( i think it might be a configuration issue from my side)
1. Domain controller : ip address: 192.168.1.5
d.G : 192.168.1.254 ( it belongs to dsl so i can get internet)
DNS: 192.168.1.5 ( pointing to itself , testing environemnt)
2. PC: ip address: 192.168.1.6
DNS: 192.168.1.5 ( pointing to the domain controller )
As a solution, ill try the solution you mentioned which is inserting a static entry into DNS.
Thx again for your help.
Regards