problem med confing.php

hej alle.

jeg kan ikke forbindelse med datebasen.

config.php
/////////////////////

<?php
$host = "xxxxx";
$usename = "xxxxx";
$pass = "xxxxxx";
$db_name = "xxxxx";
$tbl_name = "nyhed";

mysql_connect("$host", "$usename", "$pass")or die("cannot connect");
mysql_select_db("$tbl_name")or die("cannot connect DB");
?>
///////////////////


<?php

include("config.php");

$tbl_name = "nyhed";
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);

?>

error-besked:

cannot connect DB

skrev jeg noget forkert?