Modieus Slim not working

I'm having trouble with the skin "Modieus Slim". I've done as was instructed in the tutorial but the skin doesn't seem to have any effect on the appearance of the player, it just keeps showing the default player. All the other player skins that I've tested seem to work just fine (simple, slim, modieus basic). What could I be doing wrong?

Here's the code:

<script type='text/javascript'>
jwplayer('mediaspace2').setup({
'flashplayer': 'jwplayer/player.swf',
'playlistfile': 'jwplayer/tracks2.xml',
'image': 'images/deepriverdive.jpg',
'skin': 'jwplayer/modieusslim.zip',
'playlist': 'right',
'controlbar': 'bottom',
'width':'470',
'height':'180'
});
</script>

This is where I'm running the page at the moment:

http://www.av-opetus.net/johannak/music.html

Thank you so much if you can help me.