@tekka Ah OK, it's better to know it, thanks;
And I found the error this morning and it works great......
To create the configuration file for openHAB, I made a copy/paste of the Mysensors example., and I haven't seen it was a space character at the beginning of each lines.
I removed it, and it's working fine.now
So be carefull with the spaces, it was a stupid mistake and boring to find.
I have done this test 5 times, so I'm sure that it's the problem.
Thank you everybody....