I can't create a new IFMLDiagram

[robertoelli]

I can't see the item "New Representation" when I right-click on the "IFML Model Movies" of the example

I am using Eclipse Java EE IDE for Web Developers, Luna Service Release 2 (4.4.2)

[mvdw]

I have the same problem.
I followed the described steps at http://ifml.github.io/ to the letter, and it all works up until this step.