if that ois not working, then the change is not being uploaded to the server correctly.
delete the file from the server, then test the email again. You should get an error message that the file does not exist. Then upload your changes again and test again. This should fix the file does not exist error, and make sure that the changes are being uploaded.
never trust Dreamweaver to put dependent files.
If you know a file needs to go up to the server, do it it yourself rather than relying on Dreamweaver.