My Music Folder - Folder icon artwork

Hi, I am trying to figure out, why I cannot change the .jpg picture on the “My Music” folder in the ATV Media Player?

 

For some reason, I am able to change the folder picture in other directories, by adding a .jpg file, less than 600 KB, in the root directory of the particular folder.

 

However, when I try the same methodology in the “My Music” folder, for whatever reason, the icon in the ATV media Player remains that of a .jpg picture that I don’t even think I have on my hard drive?

 

I am using windows 7.

 

Any help on this would be appreciated, as it is driving me up the friggin wall!