Unicenta oPos with OMV and MySQL problem

Hello there,

I've setup an OMV(0.5.4.5) server, installed 3rd party plugin MySQL(5.1.73). Through SQL Buddy I've created an empty database "test" and user "test" with full permissions.
In OMV I've changed the bind adress to the IP adress from the server 192.***.***.***.

So far so good,

Now if I want to run Unicenta on a client pc, I fill in the name of the server, name of database and user and password, but I get this error:

com.openbravo.basic.BasicException:
Unable to connect to database: Database not available

java.sql.SQLException:
null, message from server: "Host 'test.fritz.box' is not allowed to connect to this MySQL server"

Now is there a problem with the MySQL or with Unicenta?

Thnx