[xsl] Recursive call trouble

Hi,

I'm having trouble making my call work at all.  What I'm trying to do is
break down a large paragraph into single lines of sub-strings.  Here is
what my xsl segment currently looks like:

====XSL=====

<xsl:param name = "start">1</xsl:param>
<xsl:param name = "end">60</xsl:param>
<xsl:param name = "ln">1</xsl:param>

<xsl:template match="fdoc/bl/title" name="intro">
                <xsl:variable name = "num"
select="string-length(fdoc/bl/title/para/text())" />
                
                <title>
                        <line number='$ln'>
                                <xsl:choose>
                                        <xsl:when test="$end &gt; $num">
                                                <xsl:value-of 
select="substring(floordoc/bill/title/para/text(),
$start)"/>
                                        </xsl:when>
                                        <xsl:otherwise>
                                                <xsl:value-of 
select="substring(floordoc/bill/title/para/text(),
$start,60)"/>
                                        </xsl:otherwise>
                                </xsl:choose>
                        </line>

                        <xsl:call-template name="intro">
                                <xsl:with-param name = "start" 
select='$start+60'/>
                                <xsl:with-param name = "end" select='$end+60'/>
                                <xsl:with-param name = "ln" select= '$ln+1'/>
                        </xsl:call-template>
                </title>
        </xsl:template>


Thanks!

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