asus 1015-pem keyboard can not deactivate numlock

Dear Developers,

I use Ubuntu 12.04 with latest updates, and have got a ASUS 1015 PEM netbook. When I login by Unity or Gnome Shell, I can not use my right hand keys because it comes Numlock by default, and i can not deactivate it. Now I write this from wmii environment and it does not occur.

Thanks for your help

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
NonfreeKernelModules: wl
ApportVersion: 1.91-0ubuntu1
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,vpswitch,move,place,imgpng,resize,grid,mousepoll,snap,session,regex,gnomecompat,animation,wall,fade,workarounds,expo,winrules,scale,ezoom,unityshell]
Date: Thu Feb 16 10:12:13 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120128)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)