FTP MPUT

I have a batch file running to copy some files from one server to another via FTP. When it issues the MPUT command, it starts copying files. However, it only copies between 100 and 250 (seems random) of the 500 files before quitting. The FTP timeout is set at 600 seconds, but it stops in less than 3 minutes. Is there anything else that might be limiting the file transfer?

[644 byte] By [Skippy1313] at [2008-2-4]