WMP and Firefox

Whenever I try and view a streaming video through FF with WMP I get a large E asking me to install required plugins, after I click on it to install the plugin it says none is found. How can I use WMP with FF for streaming videos?

You might want to check out this site...http://plugindoc.mozdev.org/faqs/firefox-windows.html#install-flash

It starts out with the Macromedia Player Plugin, but below it are a list of other plugins, with links. Good Luck.

EDIT: Forgot to add...sometimes Firefox cannot find the plugins automatically, so you have to download and install them manually, so the link I posted above is to install them manually.