Silly msql error.

[Excellent]

 <?php
session_start();
$conn = mysql_connect("localhost", "user", "password");
mysql_select_db("db",$conn) or die(mysql_error());
?>

Should be the fix, but you might not have the function installed or whatever, if you have php 5 i suggest you use PDO Class or MYSQLI

Already fixed it, but thanks anyway Just goes to show all coders can mess up, even on calling functions