Yes...in my dream

...also because the Roland italian factory is not far away from my town (I've sent them a curriculum, I'm actually a software engineer, but no response 'till now ;( )
...and for the suggestion, you have to say thanks to my friend's(a dealer) experience, I suppose it happened tons of time in his shop and he immediately pointed the problem...even if he told me about the expression pedal in the Up position, that I think is the same as connecting a footswitch in the expression pedal socket.
Regards,
Rival