JFM Registry error

Hi all,
I've just installed JMF and i wanted to add a device(a webcam) so i could use it in my app,because if I don't add it I cannot use it as a data source.
After the installation i opened JMF Registry and tryed to click the "add" button in "capture devices" and it keeps sending my error "could not add item".
What should I do?(I've tried to click add in other tabs but it keeps sending me that error).
Thanks

Hi again,
Recently i've been succesful in capturing the camera with jmf studio and see myself.
but when i try to capture the device with java code it doest allow me, it shows that there are no devices.
But I am able to catch the device with my jmf studio.
what should i do?

Hi again
My jmf studio is recognizing my web cam but I use this code: CaptureDeviceInfo deviceInfo = CaptureDeviceManager.getDevice("vfw:Microsoft WDM Image Capture (Win32):0");
if(deviceInfo==null)
{
System.out.println("null");
}
else
System.out.println(deviceInfo.getName());

and i allways get null.
why?

Hi i wanted to post my code that i am using so you can see what is the problem
public static void main(String[] args) throws Exception
{
// Create capture device
CaptureDeviceInfo deviceInfo = CaptureDeviceManager.getDevice("vfw:Microsoft WDM Image Capture (Win32):0");
Player player = Manager.createRealizedPlayer(deviceInfo.getLocator ());
player.start();

// Wait a few seconds for camera to initialise (otherwise img==null)
Thread.sleep(2500);
//
// // Grab a frame from the capture device
FrameGrabbingControl frameGrabber = (FrameGrabbingControl)player.getControl("javax.med ia.control.FrameGrabbingControl");
Buffer buf = frameGrabber.grabFrame();

// Convert frame to an buffered image so it can be processed and saved
Image img = (new BufferToImage((VideoFormat)buf.getFormat()).create Image(buf));
BufferedImage buffImg = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g = buffImg.createGraphics();
g.drawImage(img, null, null);

// Overlay curent time on image
g.setColor(Color.RED);
g.setFont(new Font("Verdana", Font.BOLD, 16));
g.drawString((new Date()).toString(), 10, 25);

// Save image to disk as PNG
ImageIO.write(buffImg, "png", new File("c:\\webcam.png"));

// Stop usin webcam
player.close();
player.deallocate();
System.exit(0);

CaptureDeviceInfo device = CaptureDeviceManager.getDevice("vfw:Microsoft WDM Image Capture (Win32):0");
if(device==null)
{
System.out.println("no device");
}
else
System.out.println("device exists");


Ignore the "//". when i am trying it it says "Exception in thread "main" java.lang.NullPointerException
at capture.main(capture.java:25)"
its like it doesnt know the device exists even though i can use it through the JMF studio.
what should i do?

ignore the "ignore //"