Thanks to all!
I studied the "http://developer.xojo.com/userguide/web-app-deployment" several times.
But now i understand much more better.
To Tim Hare: if i setup a CGI i have to configure the config.conf or i have to setup different folders on the Apache. Both is unknown to me.
All the documentation is not made for beginners.
I.e.: "To start a stand-alone web app, you simply run the app from the command line or terminal." That is correct.
But i don't want to start it in a terminal, i want to start it in a browser (there is no explanation why and how).
I lost a lot of time and nervs to play around. Then i started it in my terminal (PC / Linux) nothing happens. So i started Putty, connected with my new VPS, entered "./Reichweitentest_Android" and nothing happened.
After that step it works in the browser!!!
I need "Xojo web apps" for dummies (and in my language) ! :-)
I close this thread as solved! Thanks!