Braille installation

[Moritz]

Hi all
I wrote to this list some days ago but didn't got an answer so far, so I'll 
try again :) I want to install my Baum-Braille Display on a Ubuntu machine. 
According to some advice I found in the web it should work the way like I 
configured BRLTTY and everything, but the braille just doesn't make a move.
What am I doing wrong? Does BRLTTY need some special program to recognise a 
serial braille, when it's connected to the computer via its USB-Port?
Thanks a lot
Moritz