How to add Help chapters to Matlab?

I have a strange problem with my Matlab R2009b on my Mac Snow Leopard.

When I click to get the Help on Matlab :

I get some chapters, not all of them : (list en the left)

I still have the installation file, I tried to reinstall the whole thing , I first deleted Matlab app from /applications/ but nothing changed.

I really need help, I use that help frequently.

[Sean de Wolski]

What is the output from running the following? It looks like only those toolboxes were installed.

ver

Answer 1

[Makrim]

here is the solution :