I just added that line
/dev/sda2 none swap sw 0 0
in the end of fstab file and it just worked.
Nothing else needed.
Also, the # symbol in front of a line, "deletes" it, inactivates it by turning it in a comment.
But as i just said, dont bother with this, add the line i suggested and reboot
Sid Mint Xfce -32, Openbox, KDE, Enlightenment, Liquorix Kernel
HP Compaq Presario cq71, Intel Core 2 Duo T4400 @ 2.2 GHz, 3 GB DDR2 RAM, Nvidia Geforce G 103M