Mouse control using webcam

i try to interface webcam and run the code for virtual mouse control but I have the error "No public field Exposure exists for class imaq.internal.DeviceProperties". I dont know what to do. kindly anyone help me with this??? Thank you..

vidDevice = imaq.VideoDevice('winvideo', 1, 'YUY2_640x480', ... 
                    'ROI', [1 1 640 480], ...
                    'ReturnedColorSpace', 'rgb');

set(vidDevice.DeviceProperties, 'Exposure', -7); 

set(vidDevice.DeviceProperties, 'FrameRate', '30.0000');

set(vidDevice.DeviceProperties, 'Sharpness', 100); 

set(vidDevice.DeviceProperties, 'Zoom',2);

vidInfo = imaqhwinfo(vidDevice);