SharePoint 2013 CAML for Content Type Event Receiver

Have anyone tried to create event receivers for Content Type in CAML? I couldn't make it working for SharePoint 2013 though it's working in SharePoint 2010.  After deploying, I've just found the event receivers are not attached to the content type. I'm using the following CAML:

<XmlDocuments><XmlDocument NamespaceURI="http://schemas.microsoft.com/sharepoint/events"><spe:Receivers xmlns:spe="http://schemas.microsoft.com/sharepoint/events"><Receiver><Name>RatingSummaryEventHandler</Name><Type>ItemAdded</Type><SequenceNumber>10000</SequenceNumber><Assembly>SPointTest, Version=1.0.0.0, Culture=neutral, PublicKeyToken=3fad8d0486060209</Assembly><Class>SPointTest.CTReceiver</Class><Data></Data><Filter></Filter></Receiver><Receiver><Name>RatingSummaryEventHandler</Name><Type>ItemUpdated</Type><SequenceNumber>10000</SequenceNumber><Assembly>SPointTest, Version=1.0.0.0, Culture=neutral, PublicKeyToken=3fad8d0486060209</Assembly><Class>SPointTest.CTReceiver</Class><Data></Data><Filter></Filter></Receiver></spe:Receivers></XmlDocument></XmlDocuments>

Thanks,
Sohel Rana
http://ranaictiu-technicalblog.blogspot.com