Ftp gera exception quando tento listar arquivos

Pessoal to tentando fazer um simple cliente ftp, mas quando tento listar os arquivos ele gera a senguinte exception

java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(Unknown Source)
	at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
	at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
	at sun.nio.cs.StreamDecoder.read(Unknown Source)
	at java.io.InputStreamReader.read(Unknown Source)
	at java.io.BufferedReader.fill(Unknown Source)
	at java.io.BufferedReader.read(Unknown Source)
	at org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
	at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
	at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
	at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:474)
	at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:547)
	at org.apache.commons.net.ftp.FTP.port(FTP.java:872)
	at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:667)
	at org.apache.commons.net.ftp.FTPClient.initiateMListParsing(FTPClient.java:3017)
	at org.apache.commons.net.ftp.FTPClient.mlistDir(FTPClient.java:2188)
	at org.apache.commons.net.ftp.FTPClient.mlistDir(FTPClient.java:2175)
	at br.com.arius.Principal$2.actionPerformed(Principal.java:113)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.awt.EventQueue$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

meu codigo

FTPClient ftp = new FTPClient();
				try {
					ftp.connect("ftp.work.acer-euro.com");
					if(FTPReply.isPositiveCompletion(ftp.getReplyCode())){
						FTPFile[] files = ftp.listDirectories();
						for(FTPFile f : files){
							System.out.println(f.getName());
						}
					}

Se calhar é pq não apresentas o teu login e password…