In addition to Peerlees' query, I'll just add that you DON'T share files on the Forum, so it really doesn't matter what his nick is does it??.
You may need to know his IP address and try in Limewire. Nick's aren't used in LW AFAIK.
Unless it's something new in the new versions 5.x.x?? I don't use LW so sorry if I'm mistaken.