problem with xml?

[SirniNamaz]

    local xmlElements = xmlLoadFile("elements.xml") 
    local xmlNewChild = xmlCreateChild(xmlLoadFile,"element") 
    xmlNodeSetAttribute(xmlNewChild,"type",varNodeValue1) 
    xmlNodeSetAttribute(xmlNewChild,"id",varNodeValue2) 
    xmlNodeSetAttribute(xmlNewChild,"x",varNodeValue3) 
    xmlNodeSetAttribute(xmlNewChild,"y",varNodeValue4) 
    xmlNodeSetAttribute(xmlNewChild,"z",varNodeValue5) 
    xmlNodeSetAttribute(xmlNewChild,"left",varNodeValue6) 
    xmlSaveFile(xmlElements) 

in debugscript it says that there is error with xmlNodeSetAttribute

i want the xml to look something like this:

    type="weapon" id="4" x="0" y="0" z="0" left="0" /> 

  

[Castillo]

This line:

local xmlNewChild = xmlCreateChild(xmlLoadFile,"element") 

Should be:

local xmlNewChild = xmlCreateChild ( xmlElements, "element" )