Aputomaticlly start app

hi,
first of all Sorry on my bad English...
I've made qt QML application and i want to start it up automatically under Ubuntu when I turn on Pc.
I put in startup applications executable file of application but when I turn on Pc I just get blank screen.
App normally starts when I double clicked on executable file.

My guess would be you're using relative paths and when the current working directory is set to something else than you expect, you app fails to find files.