Windows Media player in a web site

I use the media player to view an asf stream from a web cam. The asf file is in a protected folder and the mediaplayer keeps prompting me for a username and password. how do I do this so that when someone views the stream via the website they do not get prompted?

I use the mediplayer plugin code to display the mediaplayer in the browser.

Can I set some properties to make the username and password available for the media player.