I FOUND THE SOLUTION BY MYSELF!
I was browsing through many forums and windows help and support program and
microsoft windows vista tech center, finally with luck would have it, the
solution is here.
http://technet2.microsoft.com/Window....mspx?mfr=true
Just go to here, and you need to install a software on Win XP to enable LLTD
Responder that allows Win XP to respond to Windows Vista.