parameter problems

hi.

I have a stylesheet fragment here....

<xsl:template match="faqs">
	<table border="2" width="100%">
		<tr><td>
			<xsl:apply-templates select="faq">
				<xsl:with-param name="fmt">
					<xsl:value-of select="'yes'" />
				</xsl:with-param>
			</xsl:apply-templates>
		</td></tr>
		<tr><td>
			<xsl:apply-templates select="faq" >
				<xsl:with-param name="fmt">
					<xsl:value-of select="'no'" />
				</xsl:with-param>
			</xsl:apply-templates>
		</td></tr>
	</table>
</xsl:template>

<xsl:template match="faq">
	<xsl:choose>
		<xsl:when test="$fmt='yes'">
			<b><xsl:value-of select="question"/></b><br />
		</xsl:when>
		<xsl:otherwise>
			<b><xsl:value-of select="question"/></b><br />
			<xsl:value-of select="answer"/><br />
		</xsl:otherwise>
	</xsl:choose>
</xsl:template>

however my XSLT transformer cannot recognise the variable '$fmt'. 
Please forgive what may be an obvious question - I'm new to this... but....
Am I doing something wrong here?

If have also tried:

	<xsl:with-param name="fmt" select="'yes'" />

instead of

	<xsl:with-param name="fmt">
		<xsl:value-of select="'yes'" />
	</xsl:with-param>


Any help would be much appreciated.

Mark.

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