Problem with Deleting QDomNode

[metdos]

Here my source code:

QDomElement rootOfTag=fieldState.firstChild().firstChildElement(parent);
QDomNodeList sameTags=rootOfTag.elementsByTagName(node.firstChild().toElement().tagName());
for(uint i=0;i<sameTags.length();i++)
{
	QDomNode nodeToReplace=sameTags.item(i);
	if(nodeToReplace.toElement().attribute("id")==node.firstChild().toElement().attribute("id"))
        {
		rootOfTag.removeChild(nodeToReplace);
		return true;
	}
}

QDomElement rootOfTag=fieldState.firstChild().firstChildElement(parent);
QDomNodeList sameTags=rootOfTag.elementsByTagName(node.firstChild().toElement().tagName());
for(uint i=0;i<sameTags.length();i++)
{
	QDomNode nodeToReplace=sameTags.item(i);
	if(nodeToReplace.toElement().attribute("id")==node.firstChild().toElement().attribute("id"))
        {
		rootOfTag.removeChild(nodeToReplace);
		return true;
	}
}

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Although it enters into if part, it can't remove "nodeToReplace" . What can be my problem?

Edit: nodeToReplace.nodeType() returns QDomNode::ElementNode, can problem related with that?