Cannot change wireless network settings

[Dima Ryazanov]

I just installed Kubuntu on a new laptop. I've set up wireless, and it worked once (I think) - but won't connect anymore and constantly prompts me for the kde-wallet password. When I try to edit the wireless network in "Network Connections", it asks me for the wallet password again, then shows the following error message:

Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager-kde (not installed)
ProcVersionSignature: Ubuntu 3.5.0-25.38-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic x86_64
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Mon Feb 25 16:49:47 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-02-23 (2 days ago)
InstallationMedia: Kubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
MarkForUpload: True
SourcePackage: networkmanagement
UpgradeStatus: No upgrade log present (probably fresh install)