Library error: There is an eror in XML-docoment (0, 0). Rootelement is missing

The code is as follows:

using System.Text;
using System.Windows.Forms;
using DotNetSiemensPLCToolBoxLibrary;
using DotNetSiemensPLCToolBoxLibrary.Communication;
using DotNetSiemensPLCToolBoxLibrary.Communication.Library;
using DotNetSiemensPLCToolBoxLibrary.Communication.Library.Interfaces;
using DotNetSiemensPLCToolBoxLibrary.Communication.Library.Pdus;
using DotNetSiemensPLCToolBoxLibrary.DataTypes.Blocks.Step7V5;
using DotNetSiemensPLCToolBoxLibrary.PLCs.S7_xxx;
public bool Connect(string ip, int port, int rack, int slot)
{
try
{
// Thread.Sleep(2000); //Sleeps otherwise it wont connect sometimes
PLCConnectionConfiguration conf = new PLCConnectionConfiguration(); ;

conf.ConfigurationType = LibNodaveConnectionConfigurationType.RegistrySavedConfiguration;


myConn = new PLCConnection("FHA");
myConn.Connect();

return true;
}
catch (Exception e)
{
Error = e.Message;
return false;
}
}
The error comes when I am calling the Connect method in myConn.
As you see I aint touching much of XML, but I am pretty sure the error happens within the .dll where it probably uses some sort of XML for something I dont know.