Prompt, to what url should specify in Live Writer for remote connection?
In version Joomla of 1.7 folders XMLRPC Does not exist.

Please see the following link.
http://www.joomler.net/documents/141-xmlrpc-for-joomla/952-why-does-livewriter-ask-the-blog-type.html

Please add the following line after the 13th line in "root/components/com_xmlrpc/models/category.php".

require_once JPATH_ADMINISTRATOR.'/components/com_categories/tables/category.php';

Does not work. Cannot find category even after adding the
require_once JPATH_ADMINISTRATOR.'/components/com_categories/tables/category.php';

Also Joomla 2.53 has Components NOT Component directory.

Regards,
Mileva

Hello
I have got a problem with XMLRPC 1.7.1, Joomla 2.5.4 and Windows Live Writer. If I want open a articel in the WLW I get the following error for the method mt.getPostCategories.

Fatal error: Call to a member function load() on a non-object in libraries/joomla/application/component/modeladmin.php on line 752

Is there a fix available for this problem?

Regards
Hoffe

Í've got the exact same problem! Is there a solution out there? This is my log output:

WindowsLiveWriter,3508,None,00051,10-Apr-2012 13:24:25.421,"Exception parsing XML-RPC response:

WindowsLive.Writer.CoreServices.XmlRpcClientInvalidResponseException: Invalid response document returned from XmlRpc server ---> System.Xml.XmlException: Er zijn meerdere hoofdelementen. Regel 2, positie 2.
bij System.Xml.XmlTextReaderImpl.Throw(Exception e)
bij System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
bij System.Xml.XmlTextReaderImpl.Throw(Int32 pos, String res)
bij System.Xml.XmlTextReaderImpl.ParseDocumentContent()
bij System.Xml.XmlTextReaderImpl.Read()
bij System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
bij System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
bij System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
bij System.Xml.XmlDocument.Load(XmlReader reader)
bij System.Xml.XmlDocument.LoadXml(String xml)
bij WindowsLive.Writer.CoreServices.XmlRpcMethodResponse..ctor(String responseText)
--- Einde van intern uitzonderingsstackpad ---
bij WindowsLive.Writer.CoreServices.XmlRpcMethodResponse..ctor(String responseText)
bij WindowsLive.Writer.CoreServices.XmlRpcClient.CallMethod(String methodName, XmlRpcValue[] parameters)

<br />
<b>Fatal error</b>: Call to a member function load() on a non-object in <b>/public/sites/www.mysite.nl/libraries/joomla/application/component/modeladmin.php</b> on line <b>752</b><br />
",""
WindowsLiveWriter,3508,None,00052,10-Apr-2012 13:24:25.421,"DisplayableException occurred: WindowsLive.Writer.Extensibility.BlogClient.BlogClientInvalidServerResponseException: Ongeldige serverrespons - De respons van de weblogserver op de methode mt.getPostCategories is ongeldig:

Invalid response document returned from XmlRpc server
bij WindowsLive.Writer.BlogClient.Clients.XmlRpcBlogClient.CallMethod(String methodName, XmlRpcValue[] parameters)
bij WindowsLive.Writer.BlogClient.Clients.MetaweblogClient.MovableTypeExtractCategories(String postId, XmlNode postNode)
bij WindowsLive.Writer.BlogClient.Clients.MetaweblogClient.ParseBlogPost(XmlNode postNode, Boolean includeCategories)
bij WindowsLive.Writer.BlogClient.Clients.MetaweblogClient.GetPost(String blogId, String postId)
bij WindowsLive.Writer.BlogClient.Blog.GetPost(String postId, Boolean isPage)
bij WindowsLive.Writer.PostEditor.RemoteWeblogBlogPostSource.GetPost(String postId)
bij WindowsLive.Writer.PostEditor.OpenPost.BlogPostListBox.RetrieveSelectedPost()
bij WindowsLive.Writer.PostEditor.OpenPost.OpenPostForm.AcceptSelectedPost()",""

Deinstall version 1.7.1 and install 1.7.2. Dont know why this update isnt made more public since it fixes a lot of headaches. Thanks for the update Joomler!

http://www.joomler.net/support/41-xmlrpc-for-joomla/1146-category-for-new-blog-entry.html#1147-recategory-for-new-blog-entry