Can't redeploy the app with Deploy

NetBeans build:
NetBeans IDE 5.0 Beta Build200509261930
JNLP Plug-in build:
12-Oct-2005 11:38:43

Steps :
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1. Create a new Java Application or open an existing one
2. Select this application in Projects View , right click mouse and invoke "Enable Java Web Start" from contextual menu .
3. Invoke Run with Java Web Start from project contextual menu , and launch the app from the link on the opened index page
4. Make some visible change to the java file , and invoke "Clean and Build Project"
5.(Optional) Stop the bundled tomcate server
6. Invoke "Deploy" from project's contextual menu , will see the tomcat server started without error.
7.(Clean jaws cache) Launch the app from the link on the opened index page

The launched application is the old one , new changes did not be deployed to the server.