I can't seem to get this thing working

OK. I've downloaded the plugin (version 0.9.3) and it installed it (copied the file "XMP-CoverArt.svp" to a new directory "C:\XMPlay\Plugins\CoverArt" directory). I then copied a random smallish JPG pic to a directory on my hard drive ("C:\Music\Test.jpg"), as well as a few MP3s.
I start XMPlay, press "F4", and then select the XMPlay Cover Art plugin, but all that it displays is "No Album Cover Found" (?). I tried copying several JPG pics to the "C:\Music" directory, but still had no luck.
I then thought that maybe the MP3s required the "Album" portion to be filled-out within the ID3 tag. So, I copied an MP3 file that indeed had an album listed within the ID3 tag, renamed one of the JPGs to this album name, and even went as far as to rename the "C:\Music" directory to the album's name. I tried a fresh install of XMPlay (I had previously downloaded the newest "Stuff" version), as well as older versions of the plugin. Still no luck at all, except for the displayed "No Album Cover Found"

Any ideas? What exactly is this thing looking for (directory structure/filenames/directory names/ID3 tags/etc...)?
P.S. Running Windows 98SE