I have ample space...after selecting for hibernation, i still left with 1.8gb. i have a 40gb drive. Last time (about 3 months back) when i used this hibernation feature, it works even with 500mb left in my drive.
It seems that the hibernation feature is corrupted. Because when i choose to hibernate, the applet of the hibernating in progress comes out and the computer hangs...like never move like that and stays at hibernating in progress.

Please help.