How do I add a function?

[BeyRevRa]

Hey, I am working on modifying my vbulleting, its kinda hard to explain but we are adding a touney section to a game website I have at www.starcraftdream.com. We are trying to add a function to the functions.php file and for some reason its not recognizing it, no matter what we do. At one point it added a bunch of php code at the top of the forum and we didn't even call it. Is the a special way that you have to add functions?

[BeyRevRa]

by the way all we are trying to do is add a simple while loop but for some reason its not working.