new board (168), old mac (osx 10.3.9).....nothing

hello all… im really depressed right now,

my computer doesnt seem to identificate my usb arduino (atmel 168)…
ive got a powerbook g4 with os x 10.3.9 and i loaded the versions from 004 to 007 and tried different drivers…
i also tried everything written i this topic:

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1143197735

but nothing happens…no usb identification on the serial port…

…is it just my noooooobism…?
…that distracts me from playing…?
…please help me if you know somthing…

greetz