Connection Timeout Disconnects using Zehon FTP - coldfusion

Question

I am using the Zehon FTP utility on a ColdFusion 9 server. When I am FTP'ing files, it creates one directory, transfers about 16 files, then gives the message :
com.zehon.exception.FileTransferException: org.apache.commons.vfs.FileSystemException: Could not connect to FTP server on "ftpservername.com".
Here's the code:
<cfscript>
//FTP server information
host = "#getSiteList.TMS_FTPADDRESS#";
username = "#getSiteList.TMS_USERNAME#";
password = "#getSiteList.TMS_PASSWORD#";
/* sendingFolder = Folder whose content is to be uploaded recursively
* to the FTP server.
*/
sendingFolder = "#local_Folder#";
/* Forward slash / = root dir of FTP server.
* if you wish to FTP to privateDir under the root, for example,
* then set destFolder to "/privateDir"
*/
destFolder = "/#parent_Folder#";
FTP = createObject("java", "com.zehon.ftp.FTP");
thisBatchTransferProgressDefault= createObject("java", "com.zehon.BatchTransferProgressDefault").init();
FileTransferStatus = createObject("java", "com.zehon.FileTransferStatus");
try {
status = FTP.sendFolder(sendingFolder, destFolder, thisBatchTransferProgressDefault, host, username, password);
if(FileTransferStatus.SUCCESS is status){
writeOutput(sendingFolder & " got ftp-ed successfully to folder " & destFolder);
}
else if(FileTransferStatus.FAILURE is status){
writeOutput("Failed to ftp to folder " & destFolder);
}
} catch (any e) {
writeOutput(e.message);
}
</cfscript>
I tried this on two different servers and the same issue. If I use FileZilla or CFFTP, I can transfer all my files (CFFTP is having issues creating subfolders, which is why I moved away from that, and we want our customers to use their web app to FTP files, not a client). Has anyone else experience this? If so, was a solution discovered? Thanks