Failed to install the bootloader

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/usbcreator/install.py", line 253, in install_bootloader
    timeout=MAX_DBUS_TIMEOUT)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.usbcreator.misc.USBCreatorProcessException: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/usb-creator/usb-creator-helper", line 193, in InstallBootloader
    'bs=446', 'count=1', 'conv=sync'])
  File "/usr/lib/python3/dist-packages/usbcreator/misc.py", line 174, in popen
    raise USBCreatorProcessException(err)
usbcreator.misc.USBCreatorProcessException: dd: failed to open '/usr/lib/syslinux/mbr.bin': No such file or directory

trying to use usb-creator-gtk to create a bootable USB with Xubuntu 14.04 iso ( downloaded through Transmission here http://cdimage.ubuntu.com/xubuntu/releases/14.04/release/xubuntu-14.04-desktop-i386.iso.torrent ) after typing root password to install bootloader a window appear and the program crash

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: usb-creator-gtk 0.2.57
ProcVersionSignature: Ubuntu 3.15.0-6.11-generic 3.15.0
Uname: Linux 3.15.0-6-generic i686
ApportVersion: 2.14.3-0ubuntu1
Architecture: i386
CurrentDesktop: XFCE
Date: Sun Jun 15 11:30:30 2014
InstallationDate: Installed on 2014-06-14 (0 days ago)
InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Alpha i386 (20140614)
SourcePackage: usb-creator
UDisksDump: Error: [Errno 2] Aucun fichier ou dossier de ce type: 'udisks' <-
UpgradeStatus: No upgrade log present (probably fresh install)