.... ?
Must say I have the original game, created an BIN/CUE from my CD and it works flawless.
So there is a problem somewhere with what you do/have.
I see in the ISO cellar that the image is listed as "CCD" format, cloneCD, should do fine I guess.
Some questions:
What soft did you use to unRAR the image?
What soft did you use to burn the CD?
What's your dosbox version?
Did you delete all old RStone (Prophet) install folders on your dosbox virtual C ?
Maybe you'll need the CloneCD virtual drive to work correctly with the downloaded image, it's a possibility.
It's pretty good and freeware:
http://www.slysoft.com/en/virtual-clonedrive.html