Windows Application Problem

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C#2.0

C#

In my Windows Form Application properties, when I click the Signing tab it shows a checkbox 'Sign the ClickOnce manifests', when I check the checkbox the 'Certificate' option gets enabled and there are four options available under the 'Certificate' option as follows:-

Issued To Mashkoor-PC\Mashkoor
Issued By Mashkoor-PC\Mashkoor
Intended Purpose <all>
Expiration Date 24,June 2014

I want to set all to none as
Issued To (none)
Issued By (none)
Intended Purpose (none)
Expiration Date (none)

I don't know how to do this please help me.