AirPlay is not working

My MacBook Air 2011 Mid has upgarded to Mountain Lion but the AirPlay is not working with my AppleTV 3rd Generation. iPhone and iPad are working well with the same AppleTV on AirPlay. The logs are attached as following. Does anyoen get the same issue?

12/8/3 上午12:30:08.903 coreaudiod[136]: 2012-08-03 12:30:08.902567 AM [AirPlayScreenClient] Starting session

12/8/3 上午12:30:09.563 coreaudiod[136]: CGSGetDisplayBounds: Invalid display 0x00000000

12/8/3 上午12:30:09.563 coreaudiod[136]: kCGErrorInvalidConnection: CGSGetEventPort: Invalid connection

12/8/3 上午12:30:09.674 coreaudiod[136]: 2012-08-03 12:30:09.674100 AM [AirPlay] ### Bad CG server port

12/8/3 上午12:30:09.674 coreaudiod[136]: 2012-08-03 12:30:09.674370 AM [AirPlay] ### Bad CG main connection ID

12/8/3 上午12:30:09.675 coreaudiod[136]: CGSRegisterConnectionNotifyProc called with invalid connection

12/8/3 上午12:30:09.688 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:09.713 SystemUIServer[366]: 2012-08-03 12:30:09.712883 AM [AVSystemController] AirPlay became the default audio device

12/8/3 上午12:30:10.688 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:11.813 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:12.813 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:13.813 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:14.938 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:15.938 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:17.063 coreaudiod[136]: CGSGetPerformanceData: Invalid connection

12/8/3 上午12:30:17.313 coreaudiod[136]: CGSRemoveConnectionNotifyProc called with invalid connection

12/8/3 上午12:30:17.316 coreaudiod[136]: 2012-08-03 12:30:17.315582 AM [AirPlay] Stopping endpoint '客廳的 Apple TV'

12/8/3 上午12:30:17.379 coreaudiod[136]: 2012-08-03 12:30:17.378667 AM [AirPlay] Disconnected from [fe80::7256:81ff:feea:4c75%en0]:49152 (from [fe80::2a37:37ff:fe25:1e1a%en0]:50533)

12/8/3 上午12:30:17.380 coreaudiod[136]: 2012-08-03 12:30:17.380326 AM [AirPlay] Stopped endpoint '客廳的 Apple TV'

12/8/3 上午12:30:17.381 coreaudiod[136]: 2012-08-03 12:30:17.380614 AM [AirPlayScreenClient] Stopping session

12/8/3 上午12:30:17.381 coreaudiod[136]: 2012-08-03 12:30:17.380803 AM [AirPlayScreenClient] Stopping session internal

12/8/3 上午12:30:17.381 coreaudiod[136]: 2012-08-03 12:30:17.381055 AM [AirPlayScreenClient] Stopped session internal

12/8/3 上午12:30:17.406 SystemUIServer[366]: 2012-08-03 12:30:17.405754 AM [AVSystemController] AirPlay no longer the default audio device