NetworkManager and Gmixer are running in KDE - how to stop them?

Hi,

Every time KDE starts, it pops up a message saying that 'another network manager is running', how can I prevent NetworkManager from starting?

Also, Gmixer is running together with KDE mixer and also in Gnome together with Gnome Mixer.
How can I prevent Gmixer from starting?

Hoping this is the right forum for this question.

Also, any mixer in Gnome does not have menu and it I can't find a way to set up channels in them. How can I access menu of the mixers in Gnome?

I was told that solution is to use KDE system configuration to disable autostart of unwanted programs