At my wit's end with grub

[Rajib Bandopadhyay]

My grub menu grub.cfg file consists of these lines(rest contents after
the file content):
---------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  insmod vbe
  insmod vga
  insmod video_bochs
  insmod video_cirrus
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 93149277-7faa-41af-8606-13ab5108a64c
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 93149277-7faa-41af-8606-13ab5108a64c
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 93149277-7faa-41af-8606-13ab5108a64c
insmod png
if background_image /usr/share/images/desktop-base/spacefun-grub.png; then
  set color_normal=light-gray/black
  set color_highlight=white/black
else
  set menu_color_normal=cyan/blue
  set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686-bigmem' --class
debian --class gnu-linux --class gnu --class os {
	insmod part_msdos
	insmod ext2
	set root='(hd0,msdos6)'
	search --no-floppy --fs-uuid --set 93149277-7faa-41af-8606-13ab5108a64c
	echo	'Loading Linux 2.6.32-5-686-bigmem ...'
	linux	/boot/vmlinuz-2.6.32-5-686-bigmem
root=UUID=93149277-7faa-41af-8606-13ab5108a64c ro  quiet
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initrd.img-2.6.32-5-686-bigmem
}
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686-bigmem (recovery
mode)' --class debian --class gnu-linux --class gnu --class os {
	insmod part_msdos
	insmod ext2
	set root='(hd0,msdos6)'
	search --no-floppy --fs-uuid --set 93149277-7faa-41af-8606-13ab5108a64c
	echo	'Loading Linux 2.6.32-5-686-bigmem ...'
	linux	/boot/vmlinuz-2.6.32-5-686-bigmem
root=UUID=93149277-7faa-41af-8606-13ab5108a64c ro single
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initrd.img-2.6.32-5-686-bigmem
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
# ----------------------------------------
#	ENTER CLOOP BOOT DATA HERE
# ----------------------------------------

}
menuentry "Knoppix Image" {
echo 1
echo 2
linux      (hd0,3)/boot/isolinux/linux root=/dev/ram rw
ramdisk_size=100000 lang=us apm=power-off nomce xmodule=fbdev
tz=/Asia/Kolkata
echo 3
initrd      (hd0,3)/boot/isolinux/minirt.gz
}

}
menuentry "Test Menu" {

}
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
------------------------------------------------------------

I wish to enter these menulists below and they worked earlier, but
somehow got broken and is not working anymore! Even the dummy menu
entry "Test Menu" doesn't show up in the list.
========================
}
menuentry "Knoppix Image" {
echo 1
echo 2
linux      (hd0,3)/boot/isolinux/linux root=/dev/ram rw
ramdisk_size=100000 lang=us apm=power-off nomce xmodule=fbdev
tz=/Asia/Kolkata
echo 3
initrd      (hd0,3)/boot/isolinux/minirt.gz
}

}
menuentry "test Amatix ISO" {
insmod ext3
set root=(hd0,1)
loopback loop /amatix/AmatixOffice_2_3.iso
linux      (loop)/live/vmlinuz1  boot=live persistent quickreboot
noautologin noxautologin nosudo nonetworking swapon nouser
union=aufs|unionfs
initrd      (loop)/live/initrd1.img
}

}
menuentry "Amatix loopback" {
insmod ext3
echo 1
set root=(hd0,1)
echo 2
linux      (hd0,3)/amatix/live/vmlinuz1 boot=live persistent
quickreboot noautologin noxautologin nosudo nonetworking swapon nouser
union=aufs|unionfs
echo 3
initrd      (hd0,3))/amatix/live/initrd1.img
}
========================
Where am I going wrong?