Problem With URL Buttons

I’m having a bit of trouble getting the URL links on my buttons to work; i followed Kirupa’s step-by-step instructions on linking URL, and put www.yahoo.com as the adress i’m linking to. But when i go to Publish Preview -> HTML, and click on the button, it always takes me to:

" E:\Flash%20MX\www.yahoo.com "

How can i fix this problem? I’m using Flash MX, in case that helps. Thanks in advance.