[RWP] how to apply one instrument to all tracks

[ondrej rosik]

Hi listers,
I am playing with Reaper for few days. Yesterday i tryed to use a SFZ 
plugin. I imported the midi file and checked "expand midi tracks to 
reaper tracks." After that i added SFZ to first track, loaded my FXB 
file and it works, except i heard only the first track. so i do the same 
for next track but when i pressed play, i heard something like a big 
gunshot. Have you any ideas, what am i doing wrong? Probably there is 
not necessary add the instrument to all tracks but how to play all 
tracks via the same instrument?
My second question is: how to apply the vocoder effect? I expect that i 
load a media to a track, add the vocoder FX, set midi imput and play 
something but after loading FX it doesn't play anything and the midi 
imput seems to work correctly, when i try to use it with for example rea 
instruments, which generates sine waves.

     thanks

       Ondrej