Dave Smith Instruments SYNTHESIZERS

hey, 
so i've had an oxygen for a few months and recently purchased an evolver.... but I 
have never tried to use the aftertouch features of either until today... and I can't seem 
to get it to work.  I can change the value of the aftertouch by pressing MIDI/SELECT 
on my oxygen, presing aftertouch, and then moving the data slider, and the evolver 
responds to this.  But if I just press and hold a note on the oxygen and then change 
the pressure, nothing seems to happen.  What am I doing wrong?  Is there something 
weird I have to do with the oxygen?  Do I have a clear concept of what aftertouch is?  
It's supposed to be the pressure applied to a key after the original note on/velocity 
message, right?  Did I get a bunky oxygen?

thanks
mark

hey
so, i've had an oxygen for a few months and purchased an evo somewhat recently... 
but until yesterday I haven't tried to use the aftertouch feature of them.  i can't seem 
to get them to work.  I don't think it's the evo's fault because the pressure mod 
destination will respond when i type in an aftertouch value on the oxygen (by 
pressing MIDI/SELECT, AFTERTOUCH, changing the DATA ENTRY slider, adn then 
MIDI/SELECT again), but it doesn't seem to respond to when i just press and hold a 
key and then change the pressure i'm pushing with (this is correct concept behind 
aftertouch, right?).  What am I doing wrong?  Do I have a faulty oxygen?

mark