Your XML/SOM error is because of your SIDL file.
Remove
<ElementType name="HtmlComponent">
<superType type="Control" />
<element name="StartUri" type="string" />
</ElementType>
Then in your EQUI.xml file add EQUI_DragonHoardWnd.xml, and remove EQUI_HtmlWnd.xml
Then you have to update your BigBank.xml