i doubt anyone uses that program on here... they're all icq freaks.
I had a go at that once, but can't remember how i did it, i thnk it may well be a % sign instead of an @.
I would say that i found Gabber to be a much much much nicer multi chat program, more responive and so forth, and of course part of the Jabber network too, which [should] be the future of IM systems.
http://gabber.sourceforge.net