See this link to correct your problem:
im sorry mate but i tryed every thing nothing atually worked and i dont understand this it told me nuthing
1. Modify WebCam setting
You might be Mirroring Vertical in WebCam Settings, you need to modify your webcam setting so that webcam upside down can be solved. To see if your camera software has a option to flip/adjust camera frames, and do as the following:
Then the only other suggestion I can come up with is try ManyCam: www.manycam.com
It's a free utility that places itself between your webcam and Skype. It should let you invert your webcam output so it's right-side-up.