FTP problem between Domino and Windows2000 FTP servers

I am attempting to FTP between the Domino server and a Windows2000 FTP server. My code is in Java and I am using an FTP package supplied by JSCAPE. I am having inconsistent success. At times my FTP runs in a few seconds, while at other times I receive a “Read Timed Out” error.I am setting my ftp timeout at 50 seconds.

Any ideas?