sessions problem

Hi.

I can´t seam to get my sessions to work. I hope anyone can help me.

 if (!session_register("home_country"))
  session_register("home_country");

$home_country = 1;

I´ve tried this to fetch the variables... But it won´t work. I don´t know if
the just are black or if I´m doing it wrong...
echo $HTTP_SESSION_VARS["home_country"];
echo $home_country;

Thank you
Samuel