Desktop freeses

Hi,
I have often problem with my desktop, I am running etch R2, it freezes  and everything stop.
Here is what I have in the .xsession with new kernel uname -a gives :

Linux debian 2.6.22-3-686 #1 SMP Mon Nov 12 08:32:57 UTC 2007 i686 GNU/Linux

• (nm-applet:2595): WARNING **: <WARNING> nma_dbus_init (): nma_dbus_init() could not acquire its service. dbus_bus_acquire_service() says: 'Connection ":1.13" is not allowed to own the service "org.freedesktop.NetworkManagerInfo" due to security policies in the configuration file'

It seems to try using a disabled services ??? how to fix it ?

thnaks for help
best regrads
bela

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