Sitemaps not working properly for me.

For some reason Google Sitemaps isn't working properly for me. I've had
it installed for around 2 weeks now, and I still get nothing for
crawling stats, page analysis, and query stats.

I'm currently using wordpress and have the sitemaps plugin installed. I
submitted it successfully and verified my site. One problem I notice is
that it shows "Errors 1" under the Sitemaps category on the overview
screen. When I check out the HTTP errors, I see a bunch of URLs listed
that are from my previous PHPNUKE installation. They're old and don't
exist anymore. It says they were last calculated on November 25th.

It also shows that the sitemaps.xml file was last submitted 18 hours
ago, and last downloaded 6 hours ago, so it should be up-to-date.

The site in question is Http://www.nohandle.com In case you need to
look at the source code.

Thanks.