In Ableton Live you should have an option to select ASIO. I'm not sure where exactly ... I don't use Live.
ASIO is a standard for audio playback and recording. (Audio Stream Input Output).
Try lowering your buffer from 256 to 128; that should decrease the amount of time it takes to fill the buffer thus making your softsynth respond faster..
But first I'd see if you can switch to ASIO if you're not already using it. You might have to resort to the owner's manuals for both Live and the 1010 for this ASIO thing.
And you thought you could just plug the keyboard in and go. Ha.
