A service is usually a Virtual Product and Virtual Products, by design, do NOT allow COD to be an option when it is the only thing in the cart ...
See if this might be the real cause of your problem ...
Add your Zone back in and your service Product and a Physical product that gets shipped and see if COD now shows ...
Now remove the Physical Product and COD will disappear again ...
Linda McGrath
If you have to think ... you haven't been zenned ...
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