okay, i googled up some information on the problem.

It seems that the executable needs to be placed in the folder /fscommand

Source
where for security reasons applications have to be stored in the "fscommand" directory of the projector, and paths as well as parameters passed to the application are ignored.
I've tested it like this and it runs fine.

you should check out the site as well, it shows you how you can run an executable in a different path.