I read the following link and several others. Everything looks correct, but still I need to manually turn swapon using gparted. Here's some outputs.

===== sudo swapon -a /dev/hda5 === output =====
sudo swapon -a
swapon: cannot canonicalize /dev/disk/by-uuid/0703bda2-3d0b-42e5-9d49-5c2634a4bd53: No such file or directory
swapon: cannot stat /dev/disk/by-uuid/0703bda2-3d0b-42e5-9d49-5c2634a4bd53: No such file or directory
===
sudo swapon -a /dev/hda5
swapon: cannot canonicalize /dev/disk/by-uuid/0703bda2-3d0b-42e5-9d49-5c2634a4bd53: No such file or directory
swapon: cannot stat /dev/disk/by-uuid/0703bda2-3d0b-42e5-9d49-5c2634a4bd53: No such file or directory
swapon: cannot stat /dev/hda5: No such file or directory

================FSCK==================
fsck 1.40.8 (13-Mar-2008)
fsck.ext3: Unable to resolve 'UUID=d8533154-cef1-4cce-a823-9f3f74aab65b'
================FSTAB=================
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda1
UUID=d8533154-cef1-4cce-a823-9f3f74aab65b / ext3 relatime,errors=remount-ro 0 1
# /dev/sda5
UUID=0703bda2-3d0b-42e5-9d49-5c2634a4bd53 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
================FDISK=================
Device Boot Start End Blocks Id System
/dev/sda1 * 1 3200 25703968+ 83 Linux
/dev/sda2 3201 3576 3020220 5 Extended
/dev/sda5 3201 3576 3020188+ 82 Linux swap / Solaris

Seen http://www.linuxquestions.org/questi...e-uuid-640366/ ?

Thanks, I'll try that next. If it does work then what happened to UUID?
Also here is the output of blkid:
sudo blkid
/dev/sda1: UUID="d8533154-cef1-4cce-a823-9f3f74aab65b" TYPE="ext3"
/dev/sda5: TYPE="swap"

Shouldn't the swap partition "/dev/sda5" reflect a UUID like the "/" partition does?

Okay, swap is now on. I changed 'fstab' from 'UUID=...' to '/dev/...'. Now the question is why command 'blkid' is still show the same UUID number instead of /dev/..