What speaker(s) are you using/trying to setup? Have they already been reset etc. Also what mobile device are you using as your controller (please state version of the OS). A little more information/context is needed here before suggestions can be made.

If the S2 App has been installed, uninstall it. Kids or guests will sometimes try to install S2 -- thinking this will enhance your system, but it usually causes trouble in systems such as yours.