bhai, mere 1st computer pay 2 lan card lage huwe hain, ak par dsl ki cable lagi huwi hai aur,dusre lan card pay 2nd computer ki cable lagi huwi hai,
1st computer ke lan card pay main ip key last mein 1 dey raha hun aur 2nd computer key ip key last mein 2 dey raha hun,aur automatically obtain kar key bi dekha hai,aur allow user to share internet connection bi kiya hai,aur firewall bi disable kiya hai...!!
2nd computer se ping nahi kar raha,1st se ping kar raha hai,

koi bhai mujhy koi asan tarika bataye...!!
google se search kar key na batiyega,
apne personal experience se batayiga.

thanks in Advance to all who help me.