Code First Base Class

   Hi

I created a base class for all my Code First Entities and I put the base class in a separate project or assembly.Now, using Code Second Approach, I enter the inject base class like 'OtherProject.EntityBase' and it generates all the codes and I was able to compile the whole project.
When I try to execute the query like:

var context = new DomainEntities(some parameters here);
var result = context.Sample.ToList();

This error will show:

Unable to get metadata for 
OtherProject.EntityBase . Make sure it is a valid entity type or POCO type with a KeyAttribute

Am I missing something?

Do i need to have a metadata (ibmmx) or something before it work?

Thanks,
Von