Note that Paul's excellent tutorial is talking about clicking on a Control in a Form which is based on a Table...which is how this must be done! You cannot do it clicking on a Cell in a Table itself.
Also note that you really, really, really need to take the time to read the article on Relational Databases/Normalization that he gave you a link for! Your displayed example is grossly flawed and will cause you constant problems, in accomplishing even the simplest tasks.
Linq ;0)>
The problem with making anything foolproof...is that fools are so darn ingenious!
All posts/responses based on Access 2003/2007