Empty NodeList

Why is it that the following NodeList gets 'created' properly, but doesn't have the single node I'd expect (i.e. why is NodeList.length = 0 and not = 1)

VB Code:

Private Sub Form_Load()
    Dim oDOM As New DOMDocument40
    Dim oDOMFrag As IXMLDOMDocumentFragment
    Dim oNodeList As IXMLDOMNodeList
    Dim oNode As IXMLDOMNode
    Dim oDocEl As IXMLDOMElement
    Dim oElem As IXMLDOMElement
    Dim oSel As IXMLDOMSelection
    Dim bRet As Boolean
    Dim lLen As Long
    
    oDOM.async = True
    bRet = oDOM.loadXML("<LogicalPair True=""Active"" False=""Inactive"">Active :: Inactive</LogicalPair>")
    
    If (bRet) Then
        Set oDocEl = oDOM.documentElement
        Set oNodeList = oDocEl.getElementsByTagName("LogicalPair")
        
        lLen = oNodeList.length
 
        Set oNode = oNodeList.Item(0)
    End If
    
End Sub