ninja shadowbox google maps marker

I want to place a link inside of the infowindow of a marker on the map and open it in a shadowbox, but it wont work, the code i put inside the infowindow of a marker is:

<a rel="shadowbox" href="http://www.bogota360.com/360/htmls/virgilio"><img alt="virgilio_portada_500" src="images/port/virgilio_portada_500.jpg" height="125" width="500" /></a>

The shadowbox is working in the articles but not in the map,

You can see the map and the menu article called "virgilio" HERE

Thanks in advance