Are you still having issues with the FTP not working in the morning? Is your ftp set to passive or active?
Actually, it's the evening when I've had most of my trouble connecting to FTP.
I believe it's set to passive. When I open Fire FTP's options, in the "connection" tab, The box under Active Mode isn't checked.
Last time was Monday evening. I was off work and at home that night and so I tried it again around 1am eastern and it worked OK. Though it didn't work a few hours later. Then it was working again a few hours after that.
I didn't try it Tuesday evening. Though at the time of this writing at about 6am, I tried just to see if it would work and it connected OK.