Can’t select database

I’ve been trying to move my site http://www.plattsburg-pschool.com.au/ to new host. I’ve transferred all the files and edited the wp_config with the name and password of the new database but I get this error:- HELP!

Can’t select database
We were able to connect to the database server (which means your username and password is okay) but not able to select the mozincne_wp1 database.

Are you sure it exists?
Does the user mozincne_wp1 have permission to use the mozincne_wp1 database?
On some systems the name of your database is prefixed with your username, so it would be like username_mozincne_wp1. Could that be the problem?