Yamaha DTXpress/DTXplorer/DTXtreme

Hey you guys and dolls,

I recently bought a midi cable, connected it to my soundblaster 5.1
and my dtxpress 2 and.....
nothing.

I cant't seem to get any sound out of my pc. I'm using cubase 5 vst
and a soundblaster.

I'm trying to use cubase as a tone generator, using the soundfonts of
my sb live 5.1, but it doesn't work.

Can anyone show me the way?

Tom