Free Email Certificate not recognized by Outlook 2010

Certificate installs just fine. I can see it in IE and I can see it in certmgr.msc
Open outlook, go to trust settings, email sercurity
Change security settings
Choose signing certificate
Nothing to choose, it is not there
What am I missing here?

Hi

Have you checked the email certificate knowledge base?

https://support.comodo.com/index.php?_m=knowledgebase&_a=view&parentcategoryid=32&pcid=96&nav=0,96

Might be something in there.

Garry