Win7 Power Save Mode & Wireshark

While capture the PC mode is turned to Power Saving. Turning the PC ON again Wireshark comes along with following Error :"The network adapter on which the capture was being done is no longer running; the capture has stopped."

I need to capture frames immediately after waking up the PC, so why is connection lost, and what can I do against it. Is this behaviour dokumented somewhere?

regards mahwrin