Management Reporter - "Couldn't retrieve the list of available databases"

Hello:

I'm working on configuring Management Reporter 2012 CU13 in our test environment, with a restored ManagementReporter database from our production environment.

We have granted a Windows Authenticated user with "sysadmin" rights in SQL.  This is the service account user and the user that I'm logged on to the server as.

Yet, upon clicking the drop-down list for databases to connect to the restored ManagementReporter database, I get the error message saying "Couldn't retrieve the list of available databases:  Login failed".  I do not get this error, if I specify "sa".

Other than ensuring that sysadmin rights are in place, what am I missing?

Thanks!

John