I'm trying to do a very basic Update Word Document activity, but I can't seem to figure this out, even after reading the white paper and doing exactly what it says.

All I'm doing is searching a particular folder for a specific word document (Customer Complaint). Once it finds the results, I do a "For Each Entry" with the Update Word doc activity. Within this word doc, I have "fields" I want to replace with metadata. Note that I also tried this with the MergeField Quick Parts and got the same results -- nothing happened. Attached are screenshots of my workflow.

I'm not sure what is going wrong, but I think I followed the instructions. I don't need to attach the document to anything (yet), so I didn't do the create entry/attach document steps.