[xsl] Passing in parameter used in matching

["Katie McNally" <kmcnally9 at hotmail dot com>]

One of my pages has a field that allows the user to enter a last name and 
then click the "search" button.  The results should display all loans that 
have a borrower with a last name that matches the criteria entered by the 
user (partial match).  The name entered by the user is passed as a parameter 
to the XSL stylesheet.  With the XSL below, the "No results were found" is 
displayed on the search results page, even when I enter a name (or partial 
name) that matches one of the borrower's last names in the XML.  What am I 
doing wrong?

XSL:

<xsl:param name="nameSearchValue">
</xsl:param>

<xsl:template match='/'>

<xsl:choose>
<xsl:when 
test=\"ReturnResultSet/LoanSearchSet/Loan/LoanBorrowerSet/Borrower[contains(LastName, 
$nameSearchValue)]\">

...xsl here creates table of loans with borrower last name matching 
criteria...

</xsl:when>
<xsl:otherwise>
<xsl:text>No results were found.</xsl:text>
</xsl:otherwise>
</xsl:choose>

</xsl:template>


XML:

<ReturnResultSet>
	<LoanSearchSet>
		<Loan>
			<LoanNumber>123</LoanNumber>
			<LoanBorrowerSet>
				<Borrower>
					<LastName>Smith</LastName>
				</Borrower>
			</LoanBorrowerSet>
		</Loan>
		<Loan>
			<LoanNumber>456</LoanNumber>
			<LoanBorrowerSet>
				<Borrower>
					<LastName>Jones</LastName>
				</Borrower>
			</LoanBorrowerSet>
		</Loan>
		<Loan>
			<LoanNumber>789</LoanNumber>
			<LoanBorrowerSet>
				<Borrower>
					<LastName>Stills</LastName>
				</Borrower>
			</LoanBorrowerSet>
		</Loan>
		...
	</LoanSearchSet>
</ReturnResultSet>

Thanks,
Katie

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