Register a BO programmatically doesnt really work!

I want to create a BO with nested Lists, fillt it with some data, register the BO, run the designer with a newly created report and see my
ready-to-use registered BO-Tree. But FR doesn't get the *nested* Objects automatically. I have to choose them manually (which is no option for me).

// The simple class-hierarchy:

public class Master {   
  public string Name { get; set; }   
  public List<Child> Children { get; set; } 
}
public class Child {   
  public string Name { get; set; }  
  public List<SubChild> SubChildren { get; set; }  
}
public class SubChild {   
  public string Name { get; set; } 
}

// Create a Sample-BO:

private Master CreateMaster()
{
  return new Master() {Name = "master", 
                       Children = new List<Child>
                                    {new Child {Name = "child-1", 
                                                 SubChildren = new List<SubChild> 
                                                                     {new SubChild {Name = "subchild-1-1"}, 
                                                                      new SubChild {Name = "subchild-1-2"}}},
                                      new Child {Name = "child-2", 
                                                 SubChildren = new List<SubChild> 
                                                                     {new SubChild {Name = "subchild-2-1"}, 
                                                                      new SubChild {Name = "subchild-2-2"}}}
                                    }};
}

//Run it:

void Go() {
  using (FastReport.Report report = new FastReport.Report())
  {
     report.Dictionary.RegisterData(new Master[] {CreateMaster()}, "MyMaster", true);
     report.Design();
  }
}

First i just see this:


Then i have to do this manually:



Then its ok:


Here's the correct frx-Xml (after manually selecting all nested objects):

<Dictionary>
  <BusinessObjectDataSource Name="MyMaster" ReferenceName="MyMaster" DataType="FastReport1.Master[], FastReport1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" Enabled="true">
    <Column Name="Name" DataType="System.String"/>
    <BusinessObjectDataSource Name="Children" DataType="System.Collections.Generic.List`1[[FastReport1.Child, FastReport1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]" Enabled="true">
      <Column Name="Name" DataType="System.String"/>
      <BusinessObjectDataSource Name="SubChildren" DataType="System.Collections.Generic.List`1[[FastReport1.SubChild, FastReport1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]" Enabled="true">
        <Column Name="Name" DataType="System.String"/>
      </BusinessObjectDataSource>
    </BusinessObjectDataSource>
  </BusinessObjectDataSource>
</Dictionary>

Here's the wrong frx-Xml (after opening in the way described above) :

<Dictionary>
  <BusinessObjectDataSource Name="MyMaster" ReferenceName="MyMaster" DataType="FastReport1.Master[], FastReport1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" Enabled="true">
    <Column Name="Name" DataType="System.String"/>
    <BusinessObjectDataSource Name="Children" Enabled="false" DataType="System.Collections.Generic.List`1[[FastReport1.Child, FastReport1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]"/>
  </BusinessObjectDataSource>
</Dictionary>

So, is there any way to achieve my goal? (I really don't want to implement the worst work-around ever: Read my BOs via reflection, build the Dictionary-Node on my own and modify the frx-Xml...)