Problems Configuring SSL for SSRS Site

Good morning-

I am trying to add SSL to my SSRS 2008 sites using a certificate from our internal CA.  I generated a certificate request using certreq.exe and an .inf file and imported it via the Certificates MMC.  If I import it into the Trusted Root Certification Authorities folder, it does not show in the drop down in the SSRS GUI.  If I import it into the Personal folder, it shows in the drop down, but I receive the following error when trying to bind:

Microsoft.ReportingServices.WmiProvider.WMIProviderException: An unknown error has occurred in the WMI Provider. Error Code 80070520

 ---> System.Runtime.InteropServices.COMException (0x80070520): A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)
   --- End of inner exception stack trace ---
   at Microsoft.ReportingServices.WmiProvider.RSWmiAdmin.ThrowOnError(ManagementBaseObject mo)
   at Microsoft.ReportingServices.WmiProvider.RSWmiAdmin.CreateSSLCertificateBinding(String application, String certificateHash, String ipAddress, Int32 port)
   at ReportServicesConfigUI.WMIProvider.RSReportServerAdmin.CreateSSLCertificateBinding(UrlApplication app, String certificateHash, String ipAddress, Int32 port)

If I run a "netsh http show sslcert" on the server, there are no SSL Certificate bindings listed. This is a brand new installation of SSRS and any help would be greatly appreciated.