InfoPath Dev

Based originally on this tutorial from MSDN; http://msdn.microsoft.com/en-us/library/cc162745.aspx#ip2007SubmitDataSPList_AddingaConnectiontotheListsWebServiceandSpecifyingtheParametersoftheUpdateListItemsWebMethod

... the form does submit, and a new item is created, all the fields are just empty.

I created the Document Library through the Publishing option through InfoPath.

In my form, one field is named 'OptionA'; In my form I have eight fields, and for the sake of simplicity I'll only focus on that one. Within the Batch CAML fragment 'Template.xml' I've defined the following;

<batch onerror="Return">
	<method id="1" cmd="New">
		<-- .... -->
		<field name="OptionA"></field>
		<-- .... -->
	</method>
</batch>

Then in my source I've limited the MSDN source to what I needed for submitting only since I have no need to read information from the list yet.

I've set a submit button up to execute custom code, where in the _Submit method I've defined the following;

XmlNamespaceManager ns = this.NamespaceManager;
DataSource dsCAML = this.DataSources["Template"];
XPathNavigator xnCAML = dsCAML.CreateNavigator();
WebServiceConnection wsSubmit = (WebServiceConnection)this.DataConnections["Web_Service_Submit"];
XPathNavigator xnDoc = this.MainDataSource.CreateNavigator();
XPathNodeIterator xiNewFields = xnDoc.Select("/my:myFields", ns);

if (xiNewFields.Count > 0)
{
	while (xiNewFields.MoveNext())
	{
		xnCAML.SelectSingleNode(
		"/Batch/Method/Field[@Name='OptionA']", ns)
		.SetValue(xiNewFields.Current.SelectSingleNode(
		"my:OptionA", ns).Value);

	// ...
	}
	
	xnCAML.SelectSingleNode("/Batch/Method/@Cmd", ns).SetValue("New");
	wsSubmit.Execute();
}
// ...

Does anyone see a disconnect in this mapping which would prevent my form information from being properly submitted to the Document Library?

Like I said, the form does submit, and a new item is created, all the fields are just empty.

Edit / Update: This is what OptionA as a field looks like in my Document Library;

<Field DisplayName="OptionA" ReadOnly="TRUE" Node="/my:myFields/my:OptionA" Type="Text"
Group="Microsoft Office InfoPath" XName="{7D93291E-27AA-4EB6-9C36-53C9D4804B74}"
ID="{d7ad1862-18bf-4a12-aa77-bcbd9df8c473}" SourceID="{3b2ae548-9f42-43f8-961f-9267d6421f24}"
StaticName="OptionA" Name="OptionA" ColName="nvarchar13" RowOrdinal="0" />