No device found on COM5 with Bossac on Winwdows 7

Hardware Arduino Due
3

Oh sorry !

I made ??a mistake in this post.
In fact my command line is:

C:\ARM\arduino-1.5.1r2\hardware\tools\bossac.exe --port=COM5 -U false -e -w -v -b C:\Users\Me\AppData\Local\Temp\build8940831537078293554.tmp\Blink.cpp.bin -R

I try to add 2 options -d et the messages displayed are :

Send auto-baud
Set binary mode
No device found on COM5

I don't understand why this command line doesn't work...

Nassa.