Signing a document using a plugin in different versions of Reader

I am signing a pdf document with my own .cer file using a plugin. Everything works great in Reader 8, I've got a green check, it specifies that this is a valid signature and I can view the certificate. In Reader 9, however, I receive a huge question mark, but it still specifies that the signature is valid and I can view the certificate. In Reader X, the signature is "UNKOWN".
How do I get rid of the question mark? Even if I delete the vector data for the drawing the question mark in the plugin, a big yellow question mark is still being displayed in Reader 9 and X.
Thank you,

Again, I know NOTHING about your plugin, your code, the certificate in question, etc.
The ONLY WAY to get you an answer is for you to provide our support staff with the PDF in question, at least as a starting point.  Please open a support contract.
From: Adobe Forums <[email protected]<mailto:[email protected]>>
Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Date: Fri, 4 Nov 2011 06:25:35 -0700
To: Leonard Rosenthol <[email protected]<mailto:[email protected]>>
Subject: Signing a document using a plugin in different versions of Reader
Re: Signing a document using a plugin in different versions of Reader
created by magdakuit<> in Acrobat SDK - View the full discussion<

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