[SmartcardServices-Users] Problem recognizing Apple's Root Certification Authority cert

I had no issue installing the Smart Card Services Update 2.0.b2 for Mountain Lion on one of my 10.8.2 machines (one that already had developer tools installed), however on a clean 10.8.2 machine. I'm unable to install the package, even after manually adding the certificate to my login key chain. I'm getting the same error that Thomas Carroll reported on Nov 8th to the list. What am I missing with my certificate install that the OS still thinks the update is untrusted? Thanks for the help, David