My DropBox Facebook App doesn't show on my Wall

I'm trying to add a SoundCloud DropBox widget to my page's wall. So far, I've managed to successfully add the app to my page, at which point it appears in the boxes tab. After selecting the edit button at the top right corner of the widget and choosing to move the DropBox from the Boxes section to my Wall, the DropBox disappears completely. The DropBox is still listed under my applications in the Edit Page screen, but it is completely absent from my public profile. Please help me figure out how to successfully move the DropBox from my boxes tab to my Wall!