"Configuration Manager cannot connect to the site" after site update from SP1 to R2

Question

Our dev SCCM environment only has a single primary site with a remote SQL database.  Initially, the dev primary site had SP1 Beta (5.00.7782.1000) installed but as everyone is aware there is no upgrade path available to SP1 or R2 from Beta; so, we uninstalled
the site and removed the database, re-installed SP1 non-Beta (5.00.7804.1000), then proceeded to update all devices with the latest client agent.  Afterwards, we attempted to upgrade the site from SP1 non-Beta (5.00.7804.1000) to R2 (5.00.7958.1000).
 All seemed well until we attempt to open the Configuration Manager console and we get the following error message:
Configuration Manager cannot connect to the site (Site Name)
The Configuration Manager Administrator console could not connect to the Configuration Manager site database. Verify the version of the console is compatible with the version of the site server you are connecting to and then try to connect again.
So we tried reinstalling the console directly from here...
"C:\Program Files\Microsoft Configuration Manager\tools\ConsoleSetup\AdminConsole.msi"
still the same error message persisted, so we tried installing it from here...
"C:\Program Files\Microsoft Configuration Manager\tools\ConsoleSetup\ConsoleSetup.exe"
still the same error message persisted, so then we tried installing it directly from the R2 (5.00.7958.1000) installation media, and afterwards the same error message persisted....
All along, we were checking the AdminConsole log from here:
"C:\Program Files (x86)\Microsoft Configuration Manager\AdminConsole\AdminUILog\SmsAdminUI.log"
Here are the contents:
[4, PID:4836][04/22/2014 15:21:10] :Property: 'Features'\r\nSystem.Management.ManagementException\r\nNot found \r\n   at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode)
   at System.Management.PropertyData.RefreshPropertyInfo()
   at System.Management.PropertyDataCollection.get_Item(String propertyName)
   at Microsoft.ConfigurationManagement.ManagementProvider.WqlQueryEngine.WqlResultObjectBase.get_Item(String name)\r\nManagementException details:
[4, PID:4836][04/22/2014 15:21:10] :ReadExtraProperties: Failed to initialize extra properties
[4, PID:4836][04/22/2014 15:21:11] :Transport error; failed to connect, message: 'The Configuration Manager Administrator console could not connect to the Configuration Manager site database. Verify the version of the console is compatible with the version
of the site server you are connecting to and then try to connect again.'\r\nMicrosoft.ConfigurationManagement.ManagementProvider.SmsConnectionWithDetailException\r\nThe Configuration Manager Administrator console could not connect to the Configuration Manager
site database. Verify the version of the console is compatible with the version of the site server you are connecting to and then try to connect again.\r\n   at Microsoft.ConfigurationManagement.AdminConsole.SmsSiteConnectionNode.ValidateConnectionParameters(ConnectionManagerBase
connection)
   at Microsoft.ConfigurationManagement.AdminConsole.SmsSiteConnectionNode.GetConnectionManagerInstance(String connectionManagerInstance)\r\nNo details are available for this error.\r\n
Once again, we validated we could connect to the SQL database from this box, and that the console was at the same version as the site.  Any help or guidance with getting our access to the console restored after the SP1 to R2 upgrade would be greatly
appreciated. 

Answer 1

From the Primary Site Server, I tried uninstalling the Admin Console and re-installing using:
consolesetup.exe /q TargetDir="%ProgramFiles%\Microsoft Configuration Manager" EnableSQM=0 DefaultSiteServerName=<SiteServerName>
Of course replacing <SiteServerName> with the FQDN of my Primary Site Server.  Console installed successfully however the same error message persists.
Also tried installing the console on a clean Windows Server 2008 R2 installation.  I tried it from the R2 (5.00.7958.1000) installation media, from the "C:\Program Files\Microsoft Configuration Manager\tools\ConsoleSetup\" both without any luck, the
same error message persists.  I verified I could ping the FQDN of the site server also, and that the firewall between the two permits communication over the ports listed here: http://technet.microsoft.com/en-us/library/hh427328.aspx
Any help would be greatly appreciated.