Cached jnlp parameters

Question

I have a dynamically generated jnlp file using a jsp that passes parameters set in the servlet context. Unfortunately, once the application is run, the parameters can never be updated and the application continues to use the old cached version. The jsp produces the correct file, but Web Start doesn't use it. Anyone have any ideas? Thanks.
<%@ page
contentType = "application/x-java-jnlp-file"
%>
<%
response.setHeader("Expires", "0"); //Doesn't work
String url = request.getRequestURL().toString();
int index = url.lastIndexOf("/");
if (index>0){
url = url.substring(0,index);
String helpURL = application.getInitParameter("HelpURL");
if (helpURL == null){
helpURL = "http://localhost";
%>
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="<%=url%>" href="test.jsp">
<information>
<title>Test</title>
<vendor>Test</vendor>
<homepage href="index.html" />
<description>Test Parameter App</description>
<icon href="images/app.gif"/>
<icon kind="splash" href="images/logo.gif"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4+"/>
<jar href="test.jar" />
</resources>
<application-desc main-class="com.test.Test">
<argument><%=helpURL%></argument>
</application-desc>
</jnlp>

Answer 1

I am having the same jnlp cache problems and would appreciate if someone can post a solution to this.
I use jsp to generate a value for a variable and I pass this variable to the application via the "property name".
tag. Problem is, JavaWebStart will always use the cached jnlp even when the variable's value changes.
Thanks for any help you can provide.
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