Coming right now from LIBA (personal experimentation airfield I took away from the military), after having regularly crashed the plane indicated. 8-)
The plane seems... well, to be diplomatic I'll only say the I've seen better tri-engines (seems almost as detailed as an AI plane), and has too much power to be realistic seen the kind of plane, but beside that, it works as advertised.

Tried to make it move with parking brake engaged too, and beside a tendency of wanting to raise on the main gear and the smallest crawl did not go. I repeat my stupid question.

If you did release the parking brake, could it be that your sim is allergic to french planes?

Can't really find a reason it should not work on your sim. :-/
There's but one real cure for human stupidity. It's called DEATH.
At the moment mourning the assassination of sarcasm and irony for the good of the "higher".
Proud FSIX user. Active user of FS98, X-plane and novic