Sharing VSAT Interent connection on LAN

I have a 128x128kbps vsat connection to my server, i can browse thru it. i install a proxy server to share to the other workstation, i have two nic on the server. yet the workstation will not brows. I loggon to the server, but will now brows. IP to VSAT:81.199.242.178
IP for LAN: 192.168.0.1
some one help