Networkmanager not starting

Hi, today I upgraded KDE 4 from 4.6 to 4.7 , but now my networkmanager doesnt start anymore. I’m trying to use the plasmoid networkmanager, but when I enable it in the system tray settings, nothing happens. When I try to add the network manager widget, it shows the following text in the widget:

This object could not be created for the following reason: Could not find requested component: org.kde.networkmanagement

When I try to open my existing network connections this is what it says (I can open this by searching for network connections in kickoff):

Cannot load library /usr/lib64/kde4/kcm_networkmanagement.so: (/usr/lib64/libknm_nm.so: undefined symbol: _ZNK5Solid7Control16NetworkInterface19disconnectInterfaceEV) Cannot load library /usr/lib64/kde4/kcm_networkmanagement.so: (/usr/lib64/libknm_nm.so: undefined symbol: _ZNK5Solid7Control16NetworkInterface19disconnectInterfaceEV)
Possible reasons:
An error occured during your last KDE upgrade leaving an orphaned control module
You have old third party modules lying around.

I tried reinstalling NetworkManager-kde4-libs, which contains both /usr/lib64/libknm_nm.so and /usr/lib64/kde4/kcm_networkmanagement.so but it didnt help.

Only the plamoid networkmanager is available in kde4.7
I suggest you test things by creating a new user, see how that behaves. But make sure the plasmoid is installed first

I created a new user, but got the same error messages. The plasmoid is installed.

Did you make the switch like this
http://dl.dropbox.com/u/10573557/Switcher%20Pics/kde47_switch.png

Thx, this got it fixed. Cant believe I looked over that :s