Problem creating simple XML document with XML SDK

[Mr. Rattles]

The following test program I'm trying to create to get acquainted with the XML SDK is failing on the attempt to create the instance of the Document. Here's the code:

#include "stdafx.h"
#include <stdio.h>
#include <comdef.h>
#include <msxml.h>
#include <atlbase.h>

#define CHECKHR(hr, error) { if (FAILED(hr)) { printf("%s\n", error); return 1; } }

int main()
{
CComPtr spDoc;
CComPtr spEle;
CComBSTR bsStr("NAME");
CComVariant vVal((int)NODE_ELEMENT);
HRESULT hr;

hr = spDoc.CoCreateInstance(__uuidof(DOMDocument));
CHECKHR(hr, "Error creating document");

hr = spDoc->createElement(bsStr, &spEle);
CHECKHR(hr, "Error creating element");

bsStr = "first";
vVal = "John";
hr = spEle->setAttribute(bsStr, vVal);
CHECKHR(hr, "Error setting first name attribute");

bsStr = "last";
vVal = "Smith";
hr = spEle->setAttribute(bsStr, vVal);
CHECKHR(hr, "Error setting last name attribute");

hr = spDoc->putref_documentElement(spEle);
CHECKHR(hr, "Error setting document element");

vVal = ".\text.xml";
hr = spDoc->save(vVal);
CHECKHR(hr, "Error saving XML document");

spDoc.Release();
return 0;
}



Any suggestions on why it's failing? It's not any of the three defined errors in the Platform SDK.

Thanks for the help