Install Windows Media Player 11 on Firefox 7.01

Today, I got a training class and want to play it for learning. When I open the Firefox 7 browser, the screen show me to need to install additional plug-in package on Firefox. Of course, I have to follow its request for playing it successfully, so I click this button.

The screen clearly tell me Windows Media Player 11 need to be installed now. So I click [Next Step] button.

Due to it cannot be installed on Firefox, I have to install it manually now. So I click [handy install] button.

Then it will automatically hyper-link to another URL and let me to download Windows Media Player Firefox Plugin.

After save it to local disk and execute it, the setup wizard has already been run now. At the moment, I know I just need to follow this wizard step and the result will be successful.

After completing this setup and close Firefox next to open it again, the screen never show up any message that miss plug-in package now. 

Now I can play the training class.