My b2evolution Version: Not Entered

I got this message. I have no idea what they're talking about:

Dear site owner or webmaster of nelsonguirado.com,

While we were indexing your webpages, we detected that some of your pages were using techniques that are outside our quality guidelines, which can be found here: http://www.google.com/support/webmasters/bin/answer.py?answer=35769&hl=en. This appears to be because your site has been modified by a third party. Typically, the offending party gains access to an insecure directory that has open permissions. Many times, they will upload files or modify existing ones, which then show up as spam in our index.

We detected cloaking on your site and suspect this is the cause. For example at http://nelsonguirado.com/ we found:

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For more information about what cloaking is, visit http://www.google.com/support/webmasters/bin/answer.py?answer=66355&hl=en.

In order to preserve the quality of our search engine, pages from nelsonguirado.com are scheduled to be removed temporarily from our search results for at least 30 days.

We would prefer to keep your pages in Google's index. If you wish to be reconsidered, please correct or remove all pages (may not be limited to the examples provided) that are outside our quality guidelines. One potential remedy is to contact your web host technical support for assistance. For more information about security for webmasters, see http://googlewebmastercentral.blogspot.com/2008/04/my-sites-been-hacked-now-what.html. When such changes have been made, please visit https://www.google.com/webmasters/tools/reconsideration?hl=en to learn more and submit your site for reconsideration.