If you’re trying to connect to your WordPress blog from Windows Live Writer desktop client, you may get this dreaded error message:

Invalid Server Response – The response to the blogger.getUsersBlogs method received from the blog server was invalid: Invalid response document returned from XmlRpc Server

This means that instead of expected XML response your blog sent back plain html or text message which is most likely some kind of error message. To see actual message you can either trace request response in an HTTP sniffer like Fiddler or simple enter endpoint url for your blog remote access (e.g. http://your.site.com/wordpress/xmlrpc.php) into your browser address bar.
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