>I removed the reference to ProfileSettings from measurement and now it works fine. However, that raises another question. How can I know set the FK releationship between the 2 files, if I can't specify the relationsship?

This is how our models are set up in terms of foreign keys (all our models are auto-generated by the Reverse POCO generator):

 // Foreign keys
        public virtual ExportJobs ExportJobs { get; set; } // FK_ExportJobs_AccountingExportJobs_ExportJobsId

Also, we have separated the models in its separate project and the web project uses view models and not models directly. In the view models you don't have to use foreign keys.

In your case you seems to be missing 'virtual' keyword. See if adding it will make a difference.