More detail log:
2006-07-27 12:12:06,515 DEBUG - [rpl_FTPTransport] Substituting server supplied IP (10.1.0.40) with remote host IP (10.1.0.40) Used mem:45 MB
2006-07-27 12:12:06,562 DEBUG - [rpl_FTPTransport] Connecting directly to ftp-server 10.1.0.40:2407 Used mem:45 MB
2006-07-27 12:12:06,593 DEBUG - [rpl_FTPTransport] Created passive data-socket: SocksConnector= Used mem:45 MB
2006-07-27 12:12:06,640 DEBUG - [rpl_FTPTransport] Created passive data-socket: Protocol=c, CompatibilityFlags=Standard, UseSSLClosure=True, WaitOnClose=True Used mem:45 MB
2006-07-27 12:12:06,671 DEBUG - [rpl_FTPTransport] ---> STOR Up/check_4b640704-c9a5-4a67-8afd-8ab75ac80902 Used mem:45 MB
2006-07-27 12:12:06,718 DEBUG - [rpl_FTPTransport] 150 Connection accepted Used mem:45 MB
2006-07-27 12:12:06,750 DEBUG - [rpl_FTPTransport] Beginning c handshake on passive data-channel Used mem:45 MB
2006-07-27 12:12:06,859 DEBUG - [rpl_FTPTransport] Handshake complete Used mem:45 MB
2006-07-27 12:12:06,906 DEBUG - [rpl_FTPTransport] Closing passive data-channel. Used mem:45 MB
2006-07-27 12:12:06,953 DEBUG - [rpl_FTPTransport] Beginning SSL closure exchange on passive data-channel. Used mem:45 MB
2006-07-27 12:12:07,000 DEBUG - [rpl_FTPTransport] OnReceive - socket not connected - closing Used mem:46 MB
2006-07-27 12:12:07,000 DEBUG - [rpl_FTPTransport] SSL closure exchange Used mem:46 MB
2006-07-27 12:12:07,078 DEBUG - [rpl_FTPTransport] Close() called when open Used mem:46 MB
2006-07-27 12:12:07,171 WARN - [rpl_FTPTransport] Caught exception closing data socket : Cannot access a disposed object.
Object name: 'System.Net.Sockets.Socket'.
2006-07-27 12:12:07,265 ERROR - [rpl_FTPTransport] Used mem:46 MB
System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.Socket'.
at System.Net.Sockets.Socket.Shutdown(SocketShutdown how)
at ek.a(SocketShutdown A_0)
at em.a(SocketShutdown A_0)
at hq.b()
at EnterpriseDT.Net.Ftp.FTPClient.a()
2006-07-27 12:12:07,421 DEBUG - [rpl_FTPTransport] Transferred 21024 bytes to remote host Used mem:46 MB
2006-07-27 12:12:07,468 DEBUG - [rpl_FTPTransport] 226 Transfer OK Used mem:46 MB
2006-07-27 12:12:07,515 DEBUG - [rpl_FTPTransport] ---> PASV Used mem:46 MB
2006-07-27 12:12:07,562 DEBUG - [rpl_FTPTransport] 227 Entering Passive Mode (10,1,0,40,9,104) Used mem:47 MB