Cancel preSign

The signature field on my pdf form continues to fire even when the person signing selects "Cancel" on the  dialogue box first to appear. All code in the preSign/postSign events fire properly if the use wants to sign. However if the user doesn't want to sign I need to prevent the postSign event from firing. Any ideas?

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Using:

Livecycle ES 3

Adobe 11 or XI

I have researched and found the following discussions but have yet to find an answer.

http://help.adobe.com/en_US/livecycle/9.0/designerHelp/index.htm?conte nt=001046.html

http://forums.adobe.com/message/5118501

http://forums.adobe.com/message/3852614#3852614#3852614#3852614

http://forums.adobe.com/thread/787110

http://forums.adobe.com/message/3442843#3442843