Did it actually print when you ran the lp command on the Pathfinder jpg on the command line (the bit you did in the screenshot in the top left)? Dropzone is just calling the lp command (and I see it says 'Detained' when you do this) so it looks like the printer might be paused or something.
Is printing to that printer from other apps working?
Hi,
when I ran the command in the terminal, happens exactly the same, nothing is printed.
In other apps there is no problem, this other apps includes from web browsers, notepad, photoshop, word etc... any app