[Google XML Sitemaps] New Post Creation error

When ever i try to create a new post, the following error occurs. Please Help. I am not able to post.

I ever tried to deactivate and deleted this plugin but still it throws the same error.

Please help, I am not able to create any new posts.

XML Sitemap

This is a XML Sitemap which is supposed to be processed by search engines like Google, MSN Search and YAHOO.
It was generated using the Blogging-Software WordPress and the Google Sitemap Generator Plugin by Arne Brachhold.
You can find more information about XML sitemaps on sitemaps.org and Google’s list of sitemap programs.