Please help me understand this error

Question

I am new to depolying applications with java webstart. When I try to download and run my application using web start I get this error:
An error occurred while launching/running the application.
Title: Brians Slide Show
Vendor: brianbjork.org
Category: Download Error
Found unsigned entry in resource: http://www.brianbjork.org/Apps/sSlideShow.jar
Here is the jnlp file:
<?xml version="1.0" encoding="utf-8"?>
<!-- JNLP File for App Demo Application -->
<jnlp
spec="1.0+"
codebase="http://www.brianbjork.org"
href="Apps/briansStarter.jnlp">
<information>
<title>Brians Slide Show</title>
<vendor>brianbjork.org</vendor>
<homepage href="http://www.brianbjork.org"/>
<description>Brians Slide Show</description>
<description kind="short">Something to learn on</description>
<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4.0+"/>
<jar href="Apps/sSlideShow.jar"/>
</resources>
<application-desc main-class="Assn3"/>
</jnlp>

Answer 1

Hi,
Probably you have to sign the sSlideShow.jar.
java.sun.com/docs/books/tutorial/jar/sign/signing.html
Another way of resolving the problem, but this way you cannot access any the client computer, to save files for example, is to take out the <all-permissions/>!
Rgds,
Andre'