When opening Responder Explorer the user may encounter the following error. After the user clicks OK, Responder Explorer closes.

This error indicates that the current user does not have a corresponding entry in the RX_USERS table. An administrator will need to add the user to the RX_USERS table using the Responder web browser. The Administration section offers a Users page that the administrator can use to add user names/passwords to the RX_USERS table.