Primary and Foreign key relation for audit tables
===

I am creating a audit control architecture from *Project Real* project from Microsoft.

In this I have two tables which needs to be linked

Below is the screen from the Project real documentation

![enter image description here][1]


But when I am running the same script to create the table and tried to create a primary and foreign key relationship. I am getting below error

![enter image description here][2] 

Any help?

  [1]: http://i.stack.imgur.com/ln5u7.jpg
  [2]: http://i.stack.imgur.com/IkmPg.jpg