HD Multi-Bitrate in Flash Media Encoder 3.2

[telmextransmisiones]

Hi. My question in title. So i want to make live broadcasting with 2 qualities or 3 qualities, for that people who had bad conection to internet can choose poor quality and watch without laggs. I am encoding since Flash Media Encoder 3.2. I Can choose same time 3 bitrates with the parameter %i in the Stream, but in the client player the switch option does not appear, do we need specified a special in the FMS URL?