I'm relatively new to SFS too, but if you want to update something like a score to all players, can't you simply use a Room Variable or User Variable to do this? Then simply add a listener and handle the event SFSEvent.ROOM_VARIABLES_UPDATE. You can also set user variables on the server-side afaik, so you don't have to leave the responsibility for scores up to the client.
If you want to use events instead of variables, I believe you have to register the event type listener on the client side. Same applies for other variable updates:
sfs.addEventListener(SFSEvent.USER_VARIABLES_UPDATE, onUserVarsUpdate);
Also quick look at the API documentation here
http://docs2x.smartfoxserver.com/api-docs/javadoc/client/
Seems to have some promising event types like OBJECT_MESSAGE.
Hope this was of any help.