Hey guys, im a newbie so go easy on me

OK, I'm trying to install a vBulletin on a free server iWebLand.com but I keep getting an error:
PHP Code:
Warning: Access denied for user: 'nac58364@66.250.74.80' (Using password: YES) in /users/iwebland.com/jerzeymob/admin/db_mysql.php on line 40
Does any one know how to fix this, or help me install a vBulletin, or anything?
Please contact me...
MSN/Email:
jordandk7@hotmail.com
Thanks a lot for your help.