IP v6 und Arduino Problem

das folgende Projekt habe ich gefunden bekomme aber Fehlermeldungen.

/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp: In function 'void arduino_debug_init()':
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:6: error: 'Serial' was not declared in this scope
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp: In function 'void arduino_debug(char*)':
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:10: error: 'Serial' was not declared in this scope
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp: In function 'void arduino_debug_hex(int)':
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:14: error: 'Serial' was not declared in this scope
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp: In function 'void arduino_debug_address(uip_ip6addr_t*)':
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:21: error: 'Serial' was not declared in this scope
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:22: error: 'Serial' was not declared in this scope
/Applications/Arduino.app/Contents/Resources/Java/libraries/ipv6EtherShield/arduino-debug.cpp:26: error: 'Serial' was not declared in this scope

Da ich ungern in den Libs rumfusche... hat jemand mehr Ahnung als ich und kann mir sagen was ich am besten tun kann um das Problem zu lösen?
Bzw selber mal eben den das Beispiel kompilieren... will nur das es schon mal drauf geht dann komm ich allein weiter :wink:
mfg