Archived:Profile settings and playing sounds in MIDlets on Series 40 2nd Edition (Known Issue)
In certain circumstances game sounds are played in Series 40 devices even if the Silent profile has been selected.
In the Nokia 6230 there is a separate setting for game sounds in the Applications menu. If the application is installed under the Application Collection menu, these game settings have no effect.
Make sure that games are installed in the Games menu and not in the Application Collection menu.