Error with funny redirect SpawnLinkedTicketInQueue

After installing this plugin I get the new button to create linked
tickets, but when I click on “Create” it redirects to:

http://rtelements/SpawnLinkedTicket?CloneTicket=2&SpawnLinkedTicket=Criar&LinkType=DependsOn-new&CloneQueue=1

As I can see on the code it tries to get the WebURL to redirect, but
something happens in the meantime that breaks it:

RT::Interface::Web::Redirect(
RT->Config->Get(‘WebURL’).“Ticket/Create.html?$query_string”

I got the plugin from here:
http://search.cpan.org/dist/RT-Extension-SpawnLinkedTicketInQueue/lib/RT/Extension/SpawnLinkedTicketInQueue.pm

Maybe is something missing on my config? I dont have a hostname (yet)
so I am acessing the server by its ip address.

José de Paula Eufrásio Júnior (coredump)
MCSO, GRC Professional
http://core.eti.br