use of '>' and '<' in test

Hi,

Simple question.
I am testing if one variable is less than another in a test statement (see
code sample below), however in XMLspy it complains.

I've seen other XSL use the same syntax, but wonder if there is another way
to structure the test so that XMLspy stays happy! ;-)

Thanks in advance for your help,

Tim

<xsl:if test="$n < $quantity">
	<input type='radio' name="paymentsystem[{@id}]/priority" value='{$n}'
onClick='addprority({position()}, {$n});' /> <xsl:value-of select="$n" />
</xsl:if>


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