Problem using WeOnlyDo.Client.FtpDLX, Timeout occu (wodSFTP / wodSFTP.NET / wodSFTPdll)

I have the next code:

[code]
'[...]
for each sFile as String in arrayFiles

try
Dim objFTP As New WeOnlyDo.Client.FtpDLX
objFTP.Blocking = 1
objFTP.LicenseKey = linceskey
objFTP.Hostname = url
objFTP.Login = user
objFTP.Password = password
objFTP.Connect()

objFTP.PutFile(sFile, serverFolder)
objFTP.Disconnect(True)

catch ex As Exception
ex.Message.ToString()
End Try
Next [/code]

the first 40, uploaded with success to server, but in the upload of follow 25 I have this error message:
ex.Message = Timeout occured due to inactivity

Saludos,