Vista Experience Index not visible

[DAS]

Here's a bizarre one that's appeared in the last couple of days.

when I go to control panel to check/re-run my rating, nothing is visible: either the current scores or the ability to re-run the index.

http://img19.imageshack.us/my.php?image=weixt7.jpg

Any ideas how I can get this back?!

Thanks

David