RSS from twitter - help desperately needed!

Hi guys, its been a while since I was last on here and i desperatley need some help!

About 6 months back I built a Twitter badge that brought in the rss feed from a particular user and displayed the most recent entry, it has been working fine…until now!

Basically if I hit ctrl+Enter it runs perfectly, displaying the feed as it should. As soon as this is exported and viewed thru a browser, it cannot find the feed. I have tested this on 2 seperate sites running on 2 seperate servers and still nothing!

How can it be that it can access a URL within the Flash IDE but not on a site?

Can anyone shed any light on this?