Load own content shapefiles in Flex Viewer

Hi,

I am new to Flex Viewer and I want to create my first map using a OSM background and some shapefiles as operational layers. I uploaded the first shapefile to arcgis.com (my content) and shared it to everyone: (http://www.arcgis.com/home/item.html...8e3e8d9165e6b0).

Now, why can't I access this shapefile from Flex Viewer. Am I missing something?

Thanks,
Andrei