Php update browser url?

I have a flash application that uses mysql and php. I pass to php some variable by calling the same page every time containing the flash movie. Everything works perfectly, i can get my vars back in flash and a new product is shown. But the browser URL never updates…
I can call from my page for exemple, i will get the good corresponding page but the URL in the browser remains, it doesn’t update to the new url… Why? how to fix that?

Thanks :slight_smile:

ps: isn’t “MY” site if you know what i mean :slight_smile: