自定義SharePoint 2010文檔集contenttype

我正在處理類型Documentset的自定義內容類型。我想設置alllowed內容類型，但這不起作用，它只顯示defeult文檔。我讀了幾個博客，但我找不到我的解決方案。自定義SharePoint 2010文檔集contenttype

<?xml version="1.0" encoding="utf-8"?> 
<Elements xmlns="http://schemas.microsoft.com/sharepoint/"> 
    <!-- Parent ContentType: Document Set (0x0120D520) --> 
    <ContentType ID="0x0120D520008d2ff418027e4c31b54d155b98596748" 
       Overwrite="True" 
       Name="Custom Dossier" 
       Group="Custom group" 
       Description="Custom dossier" 
       Inherits="True" 
       Version="0"> 
    <FieldRefs> 
      <FieldRef ID="{8D6C094C-3E1F-41f4-BEE3-25B27EE09702}" Name="Dossier_Nummer" DisplayName="Dossiernummer" Required="True" /> 
    </FieldRefs> 
    <XmlDocuments> 
     <XmlDocument NamespaceURI="http://schemas.microsoft.com/office/documentsets/allowedcontenttypes"> 
     <act:AllowedContentTypes xmlns:act="http://schemas.microsoft.com/office/documentsets/allowedcontenttypes" LastModified="05/31/2012 08:46:56"> 
      <AllowedContentType id="0x0101" /> 
      <AllowedContentType id="0x0101000490d50c50624b6ca21c637ef39cd89b" /> 
     </act:AllowedContentTypes> 
     </XmlDocument> 
    </XmlDocuments> 
    </ContentType> 
</Elements>

來源

2012-05-31 Active_t