Last time I checked Corel (assuming they make perfect works) and Microsoft did not play well together.
Back in the foggy part of my brain, I think we had to save down to wpw to an earlier version and/or save it as a different format like say open office. THen you had to go into open office and open the file, and then save as a word file.
This transferred the bulk of the information but also meant you had a lot of reformatting to do. Hopefully things have changed.