I'm guessing that you're opening the program by clicking on something. If you open a console and open the program that way (by typing qtella, I would guess, since the program is called qtella and all), you should get any error messages generated by the program, and if the program is killed you should be told why. There's the strace command if that doesn't work, but hopefully you'll get enough insight into what is going on by just running the program from a console.