JRE Cannot be installed using DT in Vista - StandardUser/Guest Account.

But we are able to install the bundles otherwise. UAC dialog will pop-up asking for username and password.
Ideally when installing through DT - UAC dialog should pop up.
Attached the screen shot.
---------------------------
Error - Getting Java
---------------------------
This Java Platform will not work on this system for the following reasons:


* This account does not have sufficient privileges to install Java. Please login to an account with administrative permissions.


Please resolve these issues before reinstalling this product.
---------------------------
OK
---------------------------

How to reproduce :
On a standard user (with UAC enabled) - Load page : http://sqindia.india.sun.com/disk17/deployment/raghu/kernel/KJRE001/installJRE.html