Raphael,
As I said I used Adobe Reader 9 (Both the Reader version and the Professional version) and none let me print.
As for Photoshop, I just checked with a colleague that had Photoshop 7.0, and when she opened the PDF it asked her for the password before she was able to print. I have no reason to believe that Adobe would not integrate its own security features in other products.
If you still require help on this, please open a support call,
by phone or
through the web .
We could then take a look at your configuration and software and see what's going on.
Hope this helps,
Eric.