knetworkmanager doesn't start connections (wired and wireless) with manually configured ip

[rstets]

knetworkmanager doesn't start connections (wired and wireless) with manually configured ip (kde 4.1, kubuntu 8.10, x86)

[hardhu (qzerty)]

In jaunty I can confirm this quite old and very annoying bug, which no solutions have been so far provided for.
The symptoms are always the same: I have defined in knetworkmanager two wired connections for my laptop, one with autoamtic (dhcp) ip configurations that I use at home, the second with manual ip configuration I use at work.
Well, when I boot my laptop at work, and I try to convince knetworkmanager to choose the work connection, nothing happens and I can see these error messages in syslog:

Jan 30 10:14:39 eagle NetworkManager: <WARN> wait_for_connection_expired(): Connection (2) /org/freedesktop/NetworkManagerSettings/Connection/1 failed to activate (timeout): (0) Connection was not provided by any settings service

Even if try to delete the connection, and to create again it, when I click on 'Save&Connect' I get an error message:

Jan 30 10:18:50 eagle NetworkManager: <WARN> connection_get_settings_cb(): connection_get_settings_cb: Invalid connection: 'NMSettingIP4Config' / 'addresses' invalid: 1
Jan 30 10:18:55 eagle NetworkManager: <WARN> wait_for_connection_expired(): Connection (2) /org/freedesktop/NetworkManagerSettings/Connection/5 failed to activate (timeout): (0) Connection was not provided by any settings service

So I am forced to quit knetworkmanager, to launch nm-applet, and to use it to choose the work connection, and nm-applet works without any problem.