Hi Muhammad
There could be several reasons why you cannot access the machines from your home computer. Can you see these machines listed in the network window in GateKeeper? Are they listed as accessible?
Is the host server set to allow "Local Network" participation?
The machines behind the VPN will need to have their Gateway network setting pointed to the host server in order to be accessible.
Can you ping the Internal IP of the machines you are trying to reach?.
Another point is that Netbios is used to display network resources such as machine names, shared drives etc, and this information can take a little while to come across the VPN.
May I suggest you read our whitepaper on understanding WinGate VPN found here for further info.
http://www.wingate.com/resources.php
Regards
Erwin