Dear @hossam, it looks like you’ve got a database connectivity issue. Here are a few things to check.
1.) Make sure the database is running.
2.) Ensure the username/password you specified, on the previous of the screen works.
3.) Ensure the username/password works from the host where you are running Tomcat/OpenMRS. MySQL users have a host linked to them, so it’s possible for a user to be able to log in from one computer, and not from another.
4.) Ensure the MySQL port isn’t blocked by a firewall.
5.) Ensure you’re trying to connect to the right port (from the settings on the previous screen).
6.) Ensure the MySQL user has rights to create a database.
Those are just some quick thoughts that come to mind of possible causes.