Keyboard won't work on LMMS

Having trouble with LMMS? Ask about it here.
For whatever reason, I can't play instruments on my keyboard. LMMS reads the Axiom I'm using, but when I select it as a MIDI input source 'n' stuff, I can't play anything.
im sure it would help if you post the name of this kb..
Also post your:
*OS
*lmms vers
*lmms sound device chosen