This might be really stupid but when you captchered it - were you able to click on it - from looking at those attributes “unselectable > on” doesnt look promising to me. Unselectable means, as you can guess, that the element is non-selectable. This is why the click isnt working as you would want it to.
Either way, can you try using the spy web to re-captcha it, just check the attributes when you do to make sure that unselectable is not there
