Fetch doesn't allow access sometimes?

This script works ok:

tell application “Fetch”
activate
put into transfer window “ftp.blahblah.com” item alias “work:PitStop Hot Folders:Files for Web - Processed:”
end tell

But when I try and send only the files in the folder like this:

tell application “Fetch”
activate
put into transfer window “ftp.blahblah.com” item {every item of alias “work:PitStop Hot Folders:Files for Web - Processed:”}
end tell

.I get the AppleScript error:

“Fetch 4.0.3 got an error: Can’t get transfer window "ftp.blahblah.com". Access not allowed.”

I have to send only the files, not the folder they are in. The file names change every day. Why doesn’t it allow me the second way?