This problem has to do with the cd

First, you need to make sure that your Qfg4 cd is inside the drive.
Second, you need to make sure and mount your cd drive into DosBox, otherwise the game won't be able to read it. Open the DosBox.cof (located where the shorcut for starting DosBox is) and go to the last line where it says you can add your own startup commands. Add this line: Mount d d:\ (replace d with your cd drive letter).
And third, you need to make sure that the cd drive letter, written inside the Qfg4 config file is the same with the one your cd rom drive uses. To do that, go to your Qfg4 installation folder, and open the config file called: RESOURCE.CFG. Look where it says: "resAUD=" and make sure the drive letter is the correct one.
And last but not least, I'm moving this topic cause it's in the wrong forum