OpenSAML user discussion

Hi,

I'm trying to parse a SAML token and while initializing 
bootstrap(DefaultBootstrap.bootstrap();), I'm encountering the error message 
pasted below. I'm using xalan-2.7.0.jar in my classpath. I tried using 
xalan-2.6.0.jar too but was getting the same error message. Any suggestions 
would be gratefully received.

java.lang.NoSuchMethodError: 
org.apache.xpath.compiler.FunctionTable.installFunction(Ljava/lang/String;Lorg/apache/xpath/Expression;)I
        org.apache.xml.security.Init.init(Init.java:215)
        
org.opensaml.DefaultBootstrap.initializeXMLSecurity(DefaultBootstrap.java:97)
        org.opensaml.DefaultBootstrap.bootstrap(DefaultBootstrap.java:71)
        
org.apache.jsp.service_005fprovider_jsp._jspService(service_005fprovider_jsp.java:121)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
        
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
        
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

Thanks,
Laks.