Why don't any posts show up using the widget Most popular post

Hi,

Using the widget Most popular posts the most popular posts should be showen here:

=> http://bit.ly/111oBYI

But they don’t…

Any idea why?

The settings seem to be right:

=> http://bit.ly/128944i

&

=>http://bit.ly/18k6uzM

Thanks in advance.

Ciao André