Vista - WMP Plugins don't seem to work

Hello everyone!

Recently I decided I want to upgrade my msn to the latest version (for various reasons), but I can't. After some 'research' I've come to the conclusion my WMP's plugins don't seem to work properly. I can't show the "What I'm listening to" on msn, and neither does Last.fm work. Here's a little screenshot I took;



I've already come to the conclusion that reinstalling WMP is not an option, but I have failed to find a solution so far.
Have you got any idea how to fix this?

Thanks in advance,

Lethys