How to read security certificates from registry using java 1.4

Hi All,
I installed one Security certificate in IE browser. that certificate is UNExportable which contains private keys which are imported to use while server cuommunication.
Now have to send that certificate for authentication to vendor server using java(J2SDK 1.4).I tried allways to do cummunication but filed due to unabalability of private key.
Here I want to read that certificate from windows sertificate registry store which is installed from IE.
Is there any way to read IE installed certificates using java. If so please provide me that code.
Its very URGENT for me.....please help
thank you
Vinod

while exporting the certificate the am able to export only public keys, private key option is disabled. but those private keys are very important for my communication. I should pass those private keys to vendor for authentication purpose.
That's way am paling to read certificate from windows registry. but am new to these concepts.
can anybody have code to read certificates from windows registry using java 1.4?

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