thanks my problem is solved now . i connect internet lan cable to linksys160 n router and set internet as static ip. now i am 2 pcs and laptop with router and networking and internet both r working fine.
however i was a bit lucky as my cable operator has not restricted mac address against my ip and i took full advantage of it. i have clone my mac address to hide other systems.
yes i one thing, all systems requires proxy address which is ip address of internet server. that strange bcoz i thought i would b using router ip add of my internal lan but its working so i do not need to worry
i also observed that my cable operator is using dsl connection...and i can access it too hehe.....just need his password