Numbers to Words Field Not Working

I have a document to which I added javascript to convert words to numbers.  I used it for two fields - one of them works and one doesn't.  It's not giving me an error; it just doesn't change when I enter a value in the referenced field.  I literally just copied the field that worked, changed the name, and changed the referenced field in the calculation.  It still doesn't work.  Can anyone give any ideas as to what the problem might be?  Thanks in advance!