php registration error?

[jimmy]

I am making my own website and im using a php script for user registration and when i go to my register page It gives me an error saying Warning: mysql_connect() [function.mysql-connect]: Host 'srv39.000webhost.com' is not allowed to connect to this MySQL server in /home/a2167654/public_html/dbc.php on line 31 what can i do to fix this by the way my domain is randomimages.us