Dynamic updating data?

How would I use flash for data that updates itself every 2 seconds?

I have a page in PHP that does NOT refresh, but instead, checks for new data and if there is any, it posts it on the page every 2 seconds dynamically.

This is for an MSN project I have, and it sends random things when people sign in, as you may know, so I need to be prepared, and I am. Whenever a message is sent, it’s posted to a page that I want FLASH to CHECK every few seconds to see if anything’s changed…