Can you post the website?
I'm able to stream wsbradio.com using Flip4Mac. I really didn't have to do anything but download and install Flip4Mac. In the settings, you can have it either open like it's supposed to, with the ads and everything in Safari (the browser I use, you can pick FireFox if you'd like) or QuickTime. I chose QT because I have access to all the controls, which are sometimes hidden when using it in the browser.