In order for you to send video to your television from your laptop, you have to select a different display for the screen to appear on (in this case, your tv). To do that, simply go to your display settings (by either right clicking your desktop, then properties, then display tab) or through control panel (under display/screen apperance). Once there, a field with the title monitor should be somewhere on the page and select your tv instead. Hit apply and okay and it should send the image to your tv now.
Hope this helps and good luck!