Arduino Due and ADK 2012

jangofei:
C:\ADK2012_IDE_0/hardware/tools/adk2tool.exe COM3 erase
erasing...done.
C:\ADK2012_IDE_0/hardware/tools/bossac.exe --port=COM3 -w -b C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\build5785210613214747736.tmp/Arduino_Terminal_App_Sample.cpp.bin
No device found on COM3
C:\ADK2012_IDE_0/hardware/tools/adk2tool.exe COM3 reset
resetting...done.

Guys, I'm trying to use a MEGA ADK and I arrived at the same point: troubles in detecting the MEGA on the COM. Any suggestions?
tnx!
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