To Use the ReMOTE SL up with Ableton 5.2 or later to use the Ableton Automap the following settings should be selected in Lives MIDI preferences;

This is assuming that you have downloaded and run the latest SL installer.

(If you have an earlier version of the installer than version 1.8, you will need to set the input and output for the remote control surface to ReMOTE SL port 2)