Forms and reports cannot be opened from within a database document, neither from
the user interface nor via API with "LoadComponentFromURL". I use the following
API code to load the component:
	public XComponent openDatabaseDocument(String _docname, boolean _bAsTemplate,
boolean _bReadOnly, XHierarchicalNameAccess _xDocuments){
	XComponent xRetComponent = null;
	try {
		XComponentLoader xComponentLoader = (XComponentLoader)
UnoRuntime.queryInterface(XComponentLoader.class, _xDocuments);
		PropertyValue[] aPropertyValues = new PropertyValue[4];
		aPropertyValues[0] = Properties.createProperty("OpenMode", _bReadOnly ? 
"openDesign": "open" ); 
		aPropertyValues[1] = Properties.createProperty("ActiveConnection",
this.DBConnection);
		aPropertyValues[2] = Properties.createProperty("DocumentTitle", _docname);
		aPropertyValues[3] = Properties.createProperty("AsTemplate", new
Boolean(_bAsTemplate));
		XHierarchicalNameContainer xHier = (XHierarchicalNameContainer)
UnoRuntime.queryInterface(XHierarchicalNameContainer.class, _xDocuments);
		if (xHier.hasByHierarchicalName(_docname)){
			xRetComponent = xComponentLoader.loadComponentFromURL(_docname, "", 0,
aPropertyValues);
		}
	} catch (Exception e) {
		e.printStackTrace(System.out);
	}
		return xRetComponent;
	}