I have what seems like a simple XSL question.  I want to combine the
attributes of two different nodes together.  Here is some sample XML:
 <?xml version="1.0" encoding="utf-8" ?>
<S Number="21002" Name="North" State="Georgia" >
   <U DateLoaded="2006-11-28" ></U>
</S>

The goal is for the XML to look like so (really, just add the
DateLoaded attribute to <S>:

<S Number="21002" Name="North" State="Georgia" DateLoaded="2006-11-28">


Here is some XSL that is NOT adding the correct value for "DateLoaded"
to the result, rather, the value is blank:

<xsl:template match="root">
	<xsl:element name="root" namespace="http://tempuri.org/root.xsd">
		<xsl:apply-templates/>
	</xsl:element>
</xsl:template>

<xsl:template match="S">
	<xsl:element name="s" use-attribute-sets="sAttributes" />
</xsl:template>

<xsl:attribute-set name="sAttributes">
	<xsl:attribute name="Number">
		<xsl:value-of select="@Number"/>
	</xsl:attribute>
	<xsl:attribute name="Name">
   	        <xsl:value-of select="@Name"/>
	</xsl:attribute>
	<xsl:attribute name="DateLoaded">
	        <xsl:value-of select="u[@DateLoaded]"/>
	</xsl:attribute>
	<xsl:attribute name="State" >
   	       <xsl:value-of select="@State"/>
	</xsl:attribute>	
</xsl:attribute-set>

Thanks for your help.
J