Update / Delete packages from server

Hello everyone,

I have a problem with the update of my packages.
We have all our packages on a place at the server. I try to delete the package by using the manager but after that the package is still available on the server.

Right now I have the problem with the Rhythm and Clockwork package.
I can’t delete those.

How do I have to do this?

Kind Regard,

Jan Willem van Asselt