Seems the server is still down.

You missed taking out a check mark during the install.

I have done that a few times and just changed the file association.
Open WMP go tools, options, select the file type tab. Make your changes there. It worked for me.
Media player classic is 6.4

Yes, I have 10 and they work fine for me.

I use the full because the Quicktime and Real alternatives do not give me the fits as the take over your computer real thing does. And they work just fine