VBS script FTPs only part of the file's content

I have a list of files to be FTPed from one server to another.  This process had been working.  Recently, only part of each file was successfully sent.  The files are all 20-30kb.  When sent to the 2nd server, only 3-6kb of each file shows up.

The script loops through the list of files and uses this code to FTP them:

Set objshell _ Createobject("wscript.shell")
objshell.run "ncftpput.exe (server stuff and file names)
set objshell = nothing

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I tried to slow the process down by adding a msgbox and it worked:

Set objshell _ Createobject("wscript.shell")
objshell.run "ncftpput.exe (server stuff and file names)
set objshell = nothing
msgbox "Press ENTER to continue"

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Next, I tried the sleep command to delay it by 20seconds. It did not work. Only parts of the files were transfered.

Set objshell _ Createobject("wscript.shell")
objshell.run "ncftpput.exe (server stuff and file names)
wscript.sleep 20000
set objshell = nothing

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