I'm using Windows Vista x 64

Recently I uninstalled Windows Live Essential 2011 because did not work a cause of Sidebybiside error.

I reinstall Windows Messanger 2009.

My webcam camera individually work fine when I press the  Microsoft Webcam icon on the desktop, I can see myself in the screen

When I tried to make a video call the connection go through, ( I can see the other person, but the other person cannot see mi ), the webcam does not show my image, appear full of black line and has no sound, similar to a TV with the cable disconnect (meaning no having signal ).

How can solve this problem ?