For the web interface to be of value, EventSentry needs to be setup to write data (event log records, performance data, logon data etc.) to your database. Starting with version 2.71 you can install EventSentry with a MySQL or MS SQL database already configured. If you installed EventSentry with the database option, EventSentry should already be configured to write information to your database.
If you did not create the database until after the installer please see our tutorial called, "Consolidating information to the EventSentry database" which will explain how to manually configure EventSentry to consolidate your information.