problema con session

[techno]

Salve sto avendo un problema con una sessione:

include("include/language.php");

if(@$_SESSION["ID_awelco"]==""){
    $_SESSION["ID_awelco"]==$RecNews["IDNews"];
    mysql_query("UPDATE news SET Visits=Visits + 1 WHERE IDNews='".$_SESSION["ID_awelco"]."'") or die (mysql_error()." errore aggiornamento visite articolo");
} 

language.php

ob_start();
session_start();

if($_SESSION["awelco_language"]=="") $_SESSION["awelco_language"]=substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],0,2);

$language=@trim($_GET["language"]);
if($language!=""){
    $_SESSION["awelco_language"]=$language;
    header("location: $_SERVER[HTTP_REFERER]");
}


ob_end_flush(); 

mi da questo errore:
Notice: Undefined index: ID_awelco