I still can't connect. First, I got "Failed to connect" and with your files I get:
Connection closed. bei BotwTrainer.TcpConn.Read(Byte[] buffer, UInt32 nobytes, UInt32& bytesRead)
bei BotwTrainer.Gecko.ReadDataBufferSize()
bei BotwTrainer.Gecko..ctor(TcpConn tcpConn, MainWindow...