FFMpeg Error #1

rj@racounteurlaptop:~$ ffmpeg -y -f x11grab -r 25 -s 1366x768 -i :0.0 -f alsa -i plughw:2,0 -acodec libmp3lame -ab 128k  -sameq /tmp/vagrantIPsoftClientAutomation.flv
ffmpeg version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav developers
  built on Mar 30 2013 22:23:21 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[x11grab @ 0x9e4ea20] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1366 height: 768
[x11grab @ 0x9e4ea20] Could not open X display.
:0.0: Input/output error