New Post: Error when making a Tree definition

Hi, I have the following issue when making a tree definition xml-file. I can't add or edit data when the xml file is implemented

I have made a screen dump to illustrate:
http://www.lysdal.com/Download/C1_tree_definition.jpg

The ~/App_Data/Composite/TreeDefinitions xml file that fails looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<ElementStructure xmlns="http://www.composite.net/ns/management/trees/treemarkup/1.0" xmlns:f="http://www.composite.net/ns/function/1.0">
    <ElementStructure.AllowedAttachments ApplicationName="Concerts">
        <DataType Type="Composite.Data.Types.IPage"/>
    </ElementStructure.AllowedAttachments>
  <ElementStructure.AutoAttachments>
    
    <NamedParent Name="Content" Position="Bottom" />
  </ElementStructure.AutoAttachments>
  <ElementRoot>
        <Children>
            <Element Label="Concerts" Id="Live">
                <Actions>
                    <AddDataAction Label="Add concerts" Type="Lysdal.ConcertItem"/>
                </Actions>
                <Children>
                    <DataFolderElements Type="Lysdal.ConcertItem" DateFormat="yyyy MMMM" FieldGroupingName="Date" Display="Compact">
                        <Children>
                            <DataElements Type="Lysdal.ConcertItem" Label="${C1:Data:Lysdal.ConcertItem:Title}" Display="Auto">
                                <Actions>
                                    <EditDataAction Label="Edit Concerts" />
                                    <DeleteDataAction Label="Delete Concerts" />
                                </Actions>
                                <Filters>
                                    <ParentIdFilter ParentType="Composite.Data.Types.IPage" ReferenceFieldName="PageId" />
                                </Filters>
                                <OrderBy>
                                    <Field FieldName="Date" Direction="ascending"></Field>
                                </OrderBy>
                            </DataElements>
                        </Children>
                    </DataFolderElements>
                </Children>
            </Element>
        </Children>
    </ElementRoot>
</ElementStructure>

I have spent a great deal of time to debug so any help would make me happy :-)