Being new to XSLT and Umbraco... I am having difficulty trying to not show a news article after it is past the current date.

Here is the code I am using to show my news list...

  <xsl:if test="$numberOfItems &gt; 0">
    <ul id="newsList">
      
      <xsl:for-each select="$articlePages">
        
        <xsl:sort select="articleDate" order="ascending"/>

        <xsl:if test="position() > $recordsPerPage * number($pageNumber) and   
        position() &lt;= number($recordsPerPage * number($pageNumber) +   
        $recordsPerPage )">
  
          <li>
            <h3>
              <a href="{umbraco.library:NiceUrl(@id)}">
                <xsl:value-of select="@nodeName"/>
              </a>
            </h3>
            <p class="articleDate">
              <xsl:value-of select="umbraco.library:FormatDateTime(articleDate,'dd MMMM yyyy')"/>
            </p>
            <p>
              <xsl:value-of select="articleSummary"/>
            </p>
          </li>
        </xsl:if>
        
      </xsl:for-each>
    </ul>

    <xsl:if test="$numberOfItems > $recordsPerPage">
      <p id="pager">
        <xsl:call-template name="pageNumbers">
          <xsl:with-param name="pageIndex" select="1"/>
        </xsl:call-template>
      </p>
    </xsl:if>
  
  </xsl:if>

I have tried entering an if statement like this...

  <xsl:variable name="expireDate" select="umbraco.library:FormatDateTime(articleDate,'yyyyMMDD')"/>
  <xsl:variable name="currentDate" select="umbraco.library:FormatDateTime(umbraco.library:CurrentDate(),'yyyyMMDD')"/>

  <xsl:if test="$currentDate &gt; $expireDate">
    
  </xsl:if>

Now this doesn't error or anything, it just doesn't do anything.  I know I am missing something simple or thinking of this the wrong way.

Any help would be greatly appreciated.

~Tony