check is not visible in enableSmartXMLParsing mode

When I set enableSmartXMLParsing for dhtmlXTreeObject and select a node a in level 2 or any level below using XML (element.setAttribute(“checked”, “CHECKED”)) the level 1 node is not shown as selected. Normally when I select a node in level 2 or any level below it whether using xml or manually I can see level 1 as selected with less visible check sign. Am I missing something ?