You cannot create a user account in the BlackBerry Administration Service

The BlackBerry Administration Service is configured to use static ports when it connects to the BlackBerry Configuration Database server, but the BlackBerry Configuration Database server uses a dynamic port.

Configure the BlackBerry Administration Service to use a dynamic port for the BlackBerry Configuration Database.

1. On the computer that hosts the BlackBerry Enterprise Server or BlackBerry Enterprise Server components, on the taskbar, click Start > Programs > BlackBerry Enterprise Server > BlackBerry Server Configuration.
2. On the Database Connectivity tab, select the Use dynamic ports or specify SQL port check box.
3. Click OK.
4. In the Windows Services, restart the services for the BlackBerry Administration Service.