Vista - Folder Versions has Non Existent List in Previous Versions Tab

I'm a noob to this forum so I hope I posted in the correct place, if not
please advise...

Anyway here is my problem: When I click on the Previous Versions Tab in a
file/folder Properties dialog, Nothing is displayed under the Folder/File
Versions section. When I say nothing, I mean NOTHING. It used to have a list
saying "No previous versions available", but now the list doesn't even
appear, it just has a huge whitespace where this list used to be.

Any ideas or suggestions? I have already tried this:
http://support.microsoft.com/default.aspx/kb/937862
And I have "File and Printer Sharing for Microsoft Networks " enabled, and
I'm pretty sure I have all the services needed running. I can make System
Restore Points and everything excpet this.

Anyway to upload a pic to see what I'm talking about?

Any help, thanks in advance.

Sorry guys, I had been looking for a solution to this for a couple of days,
and have now just found a solution.

I have Windows Vista Ultimate 32bit , Here is what worked for me:

*Open regedit.exe under Run in the Start Menu.

*Navigate to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters

*Look for the REG_DWORD types named 'AutoShareServer' and 'AutoShareWks' and
set there values to 1. If they are not there, create them.

*Restart the computer.

The only 'bad' thing about this is that it exposes your hidden shares to
people on your network if they know the name and a use the $ suffix to
display them. But this is a 'built in' feature O_o?

You can read more bout it here:
http://www.pcmag.com/article2/0,1759,2124522,00.asp

The cause of this is a botched install or some third party registry
cleaners/fixers, as well as some MS updates...

Hope this helps someone!