ActionScript 3.0 :: Webservices And Manipulate The Nodes Further Into The XML Structure

I am banging my head bloody here. I have this webservice to wich i have to post an XML scheme in order to get a result back. The XML is supposed to be formatted like illustrated in the fla file Now, when i construct this XML in Flash i can trace out properties from that, for example:

trace(wsRequestXmlBody.children().children().child ren().children()[2].text()); // traces passord.

But what i want to do is change for instance the value of that node to a dynamic value. I can manage to add a node to the XML by doing:

var testvariabel:String = "mytest"
wsRequestXmlBody.insertChildAfter(wsRequestXmlBody .children(), <test>{testvariabel}</test>);

But i just cant manage to manipulate the nodes further into the XML structure, or change their values. What i wish to do is for instance change the value of the tag <password></password> and assign my own dynamic value there.

Also, when i use the namespacing shown in the fla, it sort of strips the first tag of the original XML structure (the Envelope tag), i would like to preserve all the tags in the structure, and simply be able to change the value of some of them. I guess it has to do with the namespace structure, but i�m not good att understanding namespacing.