Ok that seems odd (especially because it works from the UI which should be the same code path). Can you please try disabling the "all offline" mode (i.e. ensure that the button is not checked and only force one of the accounts to offline (preferrably Skype first and if that works give the Google Talk one a try). Am I correct that the DBus interface above referenced your GTalk account (i.e. the part you have replaced by xxx)?