Created Unassigned: System.NullReferenceException when running from SSIS in 64bit [2048]

Hello,

I'm using the SSH.NET library in SSIS(SQL Server Integration Services) script task in in 64bit. Using actions like Create() or DownloadFIle() on an SftpClient object causes the second script task in the job to faile unexpectedly withou any errors. In the system Event log this can be found:

Application: DtsDebugHost.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception info: System.NullReferenceException
Stack:
at Renci.SshNet.Sftp.SubsystemSession.RaiseError(System.Exception)
at System.EventHandler`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Invoke(System.Object, System.__Canon)
at Renci.SshNet.Session.RaiseError(System.Exception)
at Renci.SshNet.Session.MessageListener()
at Renci.SshNet.Session.<Connect>b__4()
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()


When run in 32bit it works just fine.