Ok, i know plenty of people who can help here...

I want to make a multiplayer online game in flash.

What I am making is a game where you battle other people by attacking the object or animal they put onto feild.

how big your attack is and how much HP you have will all be stored on your computer and it will rise as you win more.

In case nobody noticed, I want to make it so you can battle other people ONLINE.

I am going to have 5 rooms each where 2 people can battle at a time. anybody can watch if they like.

anyways, I need to know where I should be storing all the data or how it will send it all...

I need recommendations!

Should I be using PHP, txt, XML, SQL, ASP, what?

somebody tell me how i can accomplish this...