FTP l.og does not work

I am using Dreamweaver CC 2015.1 Release.The FTP log window, accessed from Site->Advanced->FTP Log, stays blank while uploading files.  The Log button at the bottom right of the Files window brings up a windows that usually disappears in a flash, but sometimes persists long enough to read part of it.  The connection often times out, but repeated attempts to upload files usually succeed, eventually.  What can I do to get a more stable log of what is happening?