DDE does disruption (3) – Perhaps DDE is not build for it?

I am still complaining about DDE because I am facing the following situation:

I am working with a colleague on a project. Our code resides in a central repository on TFS. We both develop with a local clone and we sync towards our own NSF on a Domino server where we do our development work. The problem  is that she is unable to build the project and have her NSF running. I do not have those problems but perhaps that is because I have written most code lately. When I build HER NSF, the application WILL run.

We have a similar setup (version DDE, installed plugins).

When she performs a clean, build, refresh she does not get errors or anything whatsoever. What might cause that her build process does not succeed or complete?