Setting an audience from declarative WebPart?

Question

I have a module that deploys some page.

I'm adding webparts to these page, using a <AllUsersWebPart> node within a <View>:

  <View WebPartZoneID="Body"
        WebPartOrder="5"
        List="Lists/mylist"
        BaseViewID="4"
        Name="My Title">
    <![CDATA[
<webParts>
    <webPart xmlns="http://schemas.microsoft.com/WebPart/v3">
        <metaData>
            <type name="Microsoft.SharePoint.WebPartPages.XsltListViewWebPart,Microsoft.SharePoint,Version=14.0.0.0,Culture=neutral,PublicKeyToken=71e9bce111e9429c" />
            <importErrorMessage>Cannot import this Web Part.</importErrorMessage>
        </metaData>
        <data>
            <properties>
              <property name="Title" type="string">My title</property>
              <property name="AllowHide">False</property>
              <property name="AllowMinimize">False</property>
              <property name="AuthorizationFilter">;;;;MySharepointGroup</property>
              <property name="IsIncludedFilter">;;;;MySharepointGroup</property>
            </properties>
        </data>
    </webPart>
</webParts>
            ]]>
  </View>

As you can see, I'm trying to set the audience of the webpart to a specific SharePoint group, but this does not works as expected.

If I:

• don't include neither AuthorizationFilter nor IsIncludedFilter, the webpart is displaying as I expect, but for all users
• include AuthorizationFilter but not IsIncludedFilter, the webpart is displaying as I expect, but still for all users.
• include both AuthorizationFilter and IsIncludedFilter. this time, the webpart is in error, with this error :

[WebPartPageUserException: The file format is not valid. Try importing a Web Part file (.WebPart).] at Microsoft.SharePoint.WebPartPages.WebPartImporter.CreateWebPart(Boolean clearConnections) at Microsoft.SharePoint.WebPartPages.WebPartImporter.Import(SPWebPartManager manager, XmlReader reader, Boolean clearConnections, Uri webPartPageUri, SPWeb spWeb) at Microsoft.SharePoint.WebPartPages.SPWebPartManager.CompressWebPartNoSave(Boolean isClosed)

In the ULS log, there is exactly the same message, with no more error or warning.

I know I could set this audience from code, but I'd like keep my full declarative model.

What is the correct way to setup audience from xml ?