Mplayer not running with user privileges

[magina antimage <magina.the.antimage.001@gmail.com>]

Hi,
       I have ported debian-squeeze on my target x86 board and facing some problem with mplayer.
      whenever i run mplayer from root privilages it runs fine,but when i run it from user privileges  i am getting following error.

  Unable to mmap: Operation not permitted (1)

MPlayer interrupted by signal 11 in module: demux_open

 

please help,

Regards.