i'm using now Arduino IDE 0023 and udp problems disappeared, but i don't understand what to do with those other universes... now i had error messages like that
artnet_node.cpp: In function ‘void setup()’:
artnet_node.cpp:102:3: error: ‘ArduinoDmx2’ was not declared in this scope
artnet_node.cpp:112:3: error: ‘ArduinoDmx3’ was not declared in this scope
artnet_node.cpp: In function ‘int handle_dmx(artnet_dmx_t*)’:
artnet_node.cpp:193:15: error: ‘ArduinoDmx3’ was not declared in this scope
artnet_node.cpp:199:15: error: ‘ArduinoDmx2’ was not declared in this scope