[PD] Arduino : pduino digital outs ?

[tim]

I uploaded the firmware 'Pduino modified by dmorelli' to the arduino
then open pd patch 'arduino-help.pd'  (see attachment)
 
All I can get to work is analog ins.
 
can't get a led to blink

the subpatch 'sendig digital outs' contains an abstraction or object 
named 'bytemask', wich i don't have...
could this be the problem?
if yes, what/where is [bytemask] ?

thanks!
Tim
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