Come to think about it, I think the code you where given will save by default, The reason of the error is that you probably have some rouge excel instances in memory. clear them out and you'll be good to go.
JR
Thank you, JR!
How to clear the rouge excel instances in memory? I did kill all the Excel processes from windows task manager, but the pop up dialog box still shows: A file name 'RESUME.XLW' already exists in this location. Do you want to replace it?