RDP Session stop unexpected

I have problems with my RDP connection to a Windows 7 machine. It constantly closes the connection unexpectedly. The machine is in the same network i only found this log message in the event log. I searched on google for a solution but found nothing suitable. Is there a way to debug the connection to get more log information?

RDPClient_TCP: An error was encountered when transitioning from TcpStateConnectingTransport to TcpStateDisconnected in response to 2 (error code 0x80004004).

Update1:

On wireshark i found this information on the last position and marked red. The Windows Firewall is off for this connection.