I suppose you've already solved this since you posted in 2010, anyhow this may help someone else :) I had the same problem using MVC3. My original edmx file had a row that looked like this.
I can help you if you want to share your edmx file. Copy the entire xml so I can look at it and tell you what's wrong with it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.