Broken Link in Email Template - Fedex

There is a problem with our ship notification emails, specifically the link for tracking on fedex is broken (and has been broken for quite awhile). How do we fix this? It seems like it is a deeper line of code that needs to be updated somewhere.

Example link in email: http://www.fedex.com/Tracking?language=english&cntry_code=us&tracknumbers=396337042040

Page when linked clicked (404): https://www.fedex.com/apps/pagenotfound/404.shtml?language=english&cntry_code=us&tracknumbers=396337042040

Section of Code in template:

<p>
            <xsl:if test="count($order/Shipment[Status = 'Processed']) = 0">
                <i>(No shipments)</i>
            </xsl:if>
        
            <xsl:for-each select="$order/Shipment[Status = 'Processed']">
                Shipped on <b><xsl:value-of select="sw:ToShortDate(ShippedDate)" /></b>
                using <b><xsl:value-of select="ServiceUsed" /></b>: <b><xsl:call-template name="TrackingLink" /></b>
                <br />
            </xsl:for-each>
         </p>