little problem with grub2.cfg and if cmd

[Dany Flores]

Hi All

   This is the problem that I have, using grub 2.0 I have some problem with the if command, this is part of my grub.cfg

  set CQTEST=3

  if [ ${CQTESS} = 3 ]; then

          set GRUB_DEFAULT=2

  else

          set GRUB_DEFAULT=0 

  fi

   Is very simple, but when boot the server, show me an error, error: can't find command `['. 

  I need to do something or load another module or if not possible to do something like my example

Thanks