I want to select a comment node based on attribute value

[NetM]

XML NODE\[code\] <!-- url path="/jsp/Admin_BetaSignup.jsp" roles="ZohoCampaignAdmin" authentication="optional" description="Page used to add the Beta users"> <param name="zuid" xss="throwerror" max-len="300"/></url -->\[/code\]I Want to select this node via xpath . I use below code in java .\[code\]Document document = DocumentBuilderFactory.newInstance() .newDocumentBuilder() .parse("/home/local/ZOHOCORP/bharathi-1397/build/AdventNet/Sas/webapps/zcadmin/WEB-INF/security.xml");XPath xpath = XPathFactory.newInstance().newXPath();System.out.println( xpath.evaluate("//comment()[@path='/jsp/Admin_BetaSignup.jsp']", document,XPathConstants.NODE));\[/code\]Output : null .Why?