Dan:

I noticed you ran qtstalker as root. That's almost always a bad idea. I still suspect that your permissions are causing you grief.

From the [root@Debian] prompt, do this:

This should delete your qtstalker settings and force the program to re-create them. And since you're running qtstalker as user now (notice the "hilda" in there? Don't forget it!) your permissions should be correct.

If it doesn't run still, post your terminal output...