Hi,
I am not sure I understand your problem correctly (and I am still a Feng noobie), but maybe this helps:
Make sure you are using the same value in you url and in you config file (in Feng´s config directory).
What I mean is if you are accessing "http:://mydomain.net.my/opengoo" from your remote hosts you might need to replace "localhost" with "mydomain.net.my" in the config.php file located in Feng´s "config/" directory.
Also, depending on your overall network set up (i.e. no local DNS server), you *might* need to add an entry in your clients' "hosts" file to point the domain you are using to your server´s IP.
Such an entry would look like this...
10.45.23.56 mydomain.net.my
Assuming your clients are running Windows 32 bits you will find the hosts file in "C.\windows\system32\drivers\etc\hosts"
Hope this helps
Boogie