If you are an advertiser on Microsoft's Live.com AdCenter you must be alarmed by now. If you are getting anxious by your reports not being updated then stay put for some more time. An official Microsoft rep has confirmed on a Webmaster World thread that thereports are not being updated since 11th of February, 7:00 am.
I just got word that because of the adCenter maintenance this past Saturday, reporting is behind. It may take a couple days for the data to be up to date – I will keep you posted as I learn more, including the expected resolution time for this.