Folder's icons that I set, dissapeared after a while

Hi all,

Sometimes ago i got some icons and put them in the folders and made a file with the name of desktop.ini (first a .txt file) with this content :

[.ShellClassInfo]
IconFile=K:\Wallpapers\Wallpapers.ico
IconIndex=0

It was working for sometime but after a while they werent icons. So i did the windows way and clicked on properties of all the folders one by one and from the “customize” tab i did “change icon…” and selected the icons again. but again after a while they are not showing up now. What and where is the problem ? what’s the right way ? i want them to be permanent.

Win XP SP3, 32bit