[kh99]

A couple of things: unless your db has no password for the 'root' user, then you probably want to change this line to have the right info:

$game = @mysqli_connect('localhost', 'root', '', vbulletin');

(or maybe you just chnaged it so you wouldn't be posting your info).

The other thing is that if your db has a table prefix you need to add it to the user table name in the query.

Where are you putting that code?