Inviting friends

If setting a world to multi-player game to be able to invite friends, and enter a world the invite button is not there and invisible, and the multi-player switch is then turned to the off position and darkend and cannot click it to multi-player world to invite friends. If the user switches the multi-player to on and enter a world it supposed to be on have the world be able to have friends invited, the multi-player switch is not then supposed to be turned off when the user switched it on to invite friends into a world and is supposed to be able to be switched on or off in the world also.