i watched your video as well,your wasting your time trying to use both.
sonar does the same thing as fl does.
set up your kit in session drummer.open the gui just like you had it opened in fl.
just drop the samples in the kit.
session drummer 3 is drag and drop just like fl is.
you can also audition your clips in the browser the same way,up/down keys audition material as well.
you can set it to repeat the audion or one shot it.
then simply open your step sequencer and do the same thing your doing in fl.