Saman,
I guess you might be using remote panels and the IMAQ WinDraw window to display your images. If this is the case the reason for not having the image displayed is because the display window is an independent window from the front panel, which means is not part of the front panel so it won't be ported to a web browser.
You might want to use an Intensity Graph or a Picture control for displaying your images, in this way they are actually part of the front panel. Or use the suggestion provided by the first person who answer your question.
Good luck!
Nestor.
Nestor