need help (xml)!

[SirniNamaz]

            local NodeID = getElementData(source,"314613.NodeID") 
            for i=0,150 do 
                local xmlElements = xmlLoadFile("elements.xml") 
                local xmlOldChild = xmlFindChild(xmlElements,"element",i) 
                if (xmlNodeGetAttribute(xmlElements,"id") == tonumber(NodeID)) then 
                    xmlDestroyNode(xmlOldChild) 
                    xmlSaveFile(xmlElements) 
                    return 
                end 
            end 

no debugscript.. the problem is that it doesnt delete the node

[Aibo]

xmlNodeGetAttribute returns a string and you're comparing it with a number.