Lets try a different method.

Reply back to me, as you have been doing, but before you send the message attached the workbook by clicking on the button below marked GO ADVANCED (which opens another view) then look below and click on MANAGE ATTACHMENTS.

That will open a small window where you can select your workbook and upload it. Then finally send the message and the workbook.

Again, do not include an confidential information in your workbook.

This is a much shorter process than trying to explain how to locate the code and what to copy/paste, etc. etc.