Thanks for a quick reply.

My OS is Vista Home Basic. I connect to internet through LAN at home. My home desktop runs XP SP1. My internet connection is through ADSL DSL. The Modem I use is XyXel P 630. I don't have a Router. The LimeWire I am using is 4.12.11. I use Java 1.6.0_01. My ISP provider is AirTel. I am from India.

The Windows firewall at both system is turned off. Also, as per the instructions, I have activated UPnP on my home desktop. I have created room for Limewire on XP ICF, both TCP & UDP. The browser test also worked.

But even after all this, Limewire keeps saying it can't connect to internet because of firewall.