Login Package does not login to the manager

Hello everyone.
I currently try to create a simple frontend editor with the packages currently avaliable to modx revolution.

However, I use the NewsPublisher package to embed editing functionality for people who login throught the login package.
All packages and modx are updated.
[edit]
Modx: MODX Revolution 2.1.1-pl (traditional)
Login: login-1.6.1-pl
NewsPublisher: newspublisher-1.1.0-pl
[/edit]

I want to allow users to upload images to a chrooted directory, which does also work.
There is one single problem. If a user logged in throught the front end, and clicks on the tinymce image link, he needs to login again.

I found the "contexts" option on the login help page and set it to `mgr,web` but that does not solve my error.

Can someone assist me here?

I also would like to disallow the manager access completely, for users who registered themselve over the front end.
Maybe someone knows how I can do that without taking away their ability to upload images and add them in tinymce.

Thank you, Louis

Please provide at least the version of MODX and the Login package you are using...

Modx: MODX Revolution 2.1.1-pl (traditional)
Login: login-1.6.1-pl
NewsPublisher: newspublisher-1.1.0-pl
Greetings, Louis