Alfresco FTP not working

[munagala05]

Dear Sir,

I am getting this error
Error from JLAN
java.lang.NullPointerException
at org.alfresco.jlan.ftp.FTPRequest.parseCommandLine(FTPRequest.java:124)
at org.alfresco.jlan.ftp.FTPRequest.(FTPRequest.java:66)
at org.alfresco.jlan.ftp.FTPSrvSession.getNextCommand(FTPSrvSession.java:4577)
at org.alfresco.jlan.ftp.FTPSrvSession.run(FTPSrvSession.java:5043)
at java.lang.Thread.run(Thread.java:748)

Please help me.