Cann't switch between Arabic and English layouts

[Aseel]

I have added Arabic & English languages from: System settings > Keyboard > Layout
Then assign: Alt+Shift in: keys to change layouts

ProblemType: Bug
DistroRelease: elementary OS 0.3
Package: elementary-desktop 1.362+406~ubuntu0.3.1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CrashDB: elementary_meta
CurrentDesktop: Pantheon
Date: Wed Feb 11 10:59:17 2015
InstallationDate: Installed on 2015-02-10 (1 days ago)
InstallationMedia: elementary OS 0.3 "Freya" - Daily amd64 (20150208)
ProcEnviron:
 LANGUAGE=en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: elementary-meta
SuspiciousXErrors: [WARNING:flash/platform/pepper/pep_module.cpp(63)] SANDBOXED
ThirdParty: True
UpgradeStatus: No upgrade log present (probably fresh install)