I have to warn you guys first, I'm a total newbie, I haven't got the faintest idea what I'm talking about

. I'm planning on learning the basics soon though, but in the meantime, I'm relying on you here
When I run makepolltables.php (after having done everything in the readmethingy), I get the following error:
Editing post table ...
There seems to have been a slight problem with the database. Please try again by pressing the refresh button in your browser.
An E-Mail has been dispatched to our Technical Staff, who you can also contact if the problem persists.
We apologise for any inconvenience.
And this is the email I recieve:
Database error in vBulletin: Invalid SQL: ALTER TABLE post ADD pollid MEDIUMINT (8) UNSIGNED DEFAULT '0' not null
mysql error: Access denied for user: 'kroet@localhost' to database 'kroet'
mysql error number: 1044
Date: Thursday 14th of December 2000 01:47:30 PM
Script: /~kroet/murmellius/makepolltables.php
Referer:
Er? Prolly some basic, newbie, mistake on my side, but I'm curious anywayz