App nmcli fail to set network parameters

[asu]

Hi
On command line nmcli c edit 'custom net
nmcli>set ethernet.speed 10
Error: failed to set 'speed' property: the property can't be changed
On many others parameters have same errors (ethernet.speed, ethernet.duplex an so).

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: network-manager 0.9.10.0-4ubuntu15.1
Uname: Linux 4.0.4+ i686
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: i386
CurrentDesktop: Unity
Date: Thu Jun 18 11:49:52 2015
IpRoute:
 default via 192.168.0.1 dev eth0 proto static metric 1024
 169.254.0.0/16 dev eth0 scope link metric 1000
 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.3
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=false
 WimaxEnabled=true
RfKill:

SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH ACTIVE DEVICE STATE ACTIVE-PATH
 custom net 97eb829a-c026-4364-b646-09cfaaf3aa0d 802-3-ethernet 1434617266 Thu 18 Jun 2015 11:47:46 AM EEST yes no /org/freedesktop/NetworkManager/Settings/0 yes eth0 activated /org/freedesktop/NetworkManager/ActiveConnection/29
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 eth0 ethernet connected /org/freedesktop/NetworkManager/Devices/28 custom net 97eb829a-c026-4364-b646-09cfaaf3aa0d /org/freedesktop/NetworkManager/ActiveConnection/29
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.