Different versions of Java webstart and Java Runtime Environment

Hi I am using a thin application client (swings application) which is downloaded as a jar file using Java Web Start. The earlier version of the application was deployed on the server and client using the version 1.5.0_09. Due to some performance measures we are changing the Client version of JRE to 1.6.0_03. Will this really help??
The approach we are following is bit confusing.
First we are launching the application in JRE 1.5.0_09 and creating a shortcut for that (WebStart shortcut). Later we are changing the Java Web Start version from 1.5.0_09 to 1.6.0_03 in the shortcut.
And of course also changing the JNLP j2se version tag to 1.6
The application we are launching using this shortcut but its throwing FailedDownloadException : Unable to Load Resource hxxp://ascdcf.....*.jnlp
The funny thing is when i launched the same shortcut using the 1.5.0_09 version i.e. only the WebStart version as 1.5.0_09 and the JRE on client as 1.6.0_03 the application starts.
I searched about this and came to know that webstart just deploys the application jar on the client in a browser independent form and then it is run on JRE. If thats the case (and if i am right) then Webstart version can be anything only the JRE version should be the latest as specified in the JNLP. Can anyone give me suggestions in this regard???
Also if this approach is correct where will we get more performance???
1. Is it running application on updated JRE Version i.e. 1.6.0_03
2. Or on updating Java Web Start i.e. 1.6.0_03 (curretnly which is not running)
Also the Java Web Start is a part of JRE then where does this lead to....???
I am just an amateur with great doubts.....kindly help......

Hello,
I suggest you really read, understand and trial-and-error the following previously suggested solutions;
http://stealthpuppy.com/juggling-sun-java-runtimes-in-app-v/
http://packageology.com/2014/02/sequencing-java-the-definitive-guide-part-1/
http://packageology.com/2014/02/sequencing-java-definitive-guide-part-2/
http://packageology.com/2014/02/sequencing-java-definitive-guide-part-3-restricting-access-insecure-java-versions/
Nicke Källén | The Knack| Twitter:
@Znackattack

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