In case you ever have problems getting your initial admin account to work (the one specified in the shared.properties file), there is also a secondary admin account that is automatically created that can be used. From the "First Time Login" section of Chapter 18 of the Rollbase in Action document:

Apart from creating first administrative user account the system will create second administrative account:

User name: admin2

Password: welcome

Use this account if you're having problem to login as first administrative user. Delete or disable this account when you no longer need it.

Had a situation where we could not get the initial account working - this saved the day. 

Simply go to your default login window of http://<your install address>:8080/router/login/login.jsp and use the above credentials and you should be ready to go.