Vista hibernate not working/not an option

"From this microsoft kb article on enabling/disabling hibernation:

To make hibernation available, follow these steps:

Click Start, and then type cmd in the Start Search box.
In the search results list, right-click Command Prompt, and then click Run as Administrator.
When you are prompted by User Account Control, click Continue.
At the command prompt, type powercfg.exe /hibernate on, and then press ENTER.
Type exit, and then press ENTER to close the Command Prompt window."