Messages marked as spam after installing latest S/MIME controls

I had a problem of having a "?" appering in the beginning all of my OWA sent messages which was resolved by installing the latest S/MIME controls. Now, however, messages I am sending to a client with McAfee Groupware is flagging all of my messages as *spam*. When I uninstall the S/MIME control, the messages are not flagged and come through just fine.
MPDAILEYAsked:
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VahikConnect With a Mentor Commented:
http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_21105920.html

try this solution.it worked for the person that posted without the S/MIME controls.
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