error al instalar openvas-server  en bactrack 4 r2


apt-get install openvas-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package openvas-server is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  openvas-menu
E: Package openvas-server has no installation candidate

como inicio el servidor de openvas?.      en bactrack r1 lo iniciava asi.   openvas-server start

lo mismo te falta algo mira aqui aver si te vale esta pagina
http://www.openvas.org/openvas-server.html