Go to cPanel --> Remote MySQL and make sure that the list of Remote Hosts looks like:
10.33.248.%
10.33.249.3
int.starka.x10hosting.com
Also, looking at the errors on your page, it seems that the script is trying to connect to the MySQL server using default values.
Not using password and the database username should be of the form yourCPanelUsername_something. Maybe the script cannot find your configuration file.
Seeing the other PHP errors, it looks like your installation is very badly messed up.