What exactly is wrong with this XML

In the code below, if I take out the ‘<fbAnsIntro></fbAnsIntro>’ node everything works fine. I have tried changing it’s name, putting text inside the node, etc.

I get this error


1084: Syntax error: expecting identifier before xmltagstartend.


	fdbckOutline =
	<fbQuestIntro>To the Question</fbQuestIntro>
	<fbAnsIntro></fbAnsIntro>;
	
	scenarioMapXML.appendChild(fdbckOutline);