Help! Attempting to get the user's profile results in UserProfileApplicationNotAvailableException (ServerTooBusyException)

Here's my code:

ProfileLoader loader = ProfileLoader.GetProfileLoader(SPServiceContext.Current, false);
return loader.GetUserProfile();

Here's there error I'm getting:

Microsoft.Office.Server.UserProfiles.UserProfileApplicationNotAvailableException was unhandled by user code
  HResult=-2146233088
  Message=UserProfileDBCache_WCFLogging :: ProfileDBCacheServiceClient.GetUserData threw exceptionSystem.ServiceModel.ServerTooBusyException
  Source=Microsoft.Office.Server.UserProfiles

I have this working fine on a different box.  For some reason this particular installation is giving me grief.

Has anyone seen this before?  Any suggestions as to how to even begin to diagnose the problem?

Thanks for your time I appreciate it.
 - Ed.