I'm using the blog application in Umbraco 4.5.2. In my xslt I'm trying to use Request to get the filterBy to return a list of 'tagged' posts but it's always coming back as empty. I'm trying to print the value out to the screen by doing this:

      <xsl:value-of select="umbraco.library:RequestQueryString('filterBy')"/>

Or

      <xsl:value-of select="umbraco.library:RequestServerVariables('QUERY_STRING')"/>

I did the above to see if it was my code for passing it into a variable (which it wasn't). My code to get the filterBy into a variable is as follows:

  <xsl:variable name="filter">
    <xsl:choose>
      <xsl:when test="string-length(umbraco.library:RequestQueryString('filterBy')) &gt; 0">
        <xsl:value-of select="umbraco.library:RequestQueryString('filterBy')"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:value-of select="''"/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

Non of the above are working and I have no idea why. Stating the obvious, filterBy has a value in the Query String: http://test.ecargo.co.nz/news.aspx#?filterby=Our%20Customers :)

What is going wrong?