Cannot Upgrade a Database Created with 2008 Express (100) to be compatible with SQL Express 2014 (120)

I have upgraded my SQL Server 2008 Express Instance to SQL Server 2014 Express.  When I go into the Configuration Manager and select a database that was created with the original edition, I am not able to upgrade the compatibility level to the new Edition.  SQL Server 2014 (level 120) is not available from the pull down.

I tried running the SQL script that is recommended by MSDN

ALTER DATABASE database_name   
SET COMPATIBILITY_LEVEL = 120 

I get an error stating that the COMPATIBILITY_LEVEL that I am trying to use is unavailable.

Any help with fixing this issue will be greatly appreciated.  Thanks in advance.

Regards,

Matthew Paisley

matt.paisley57@gmail.com