First, thanks for doing what you do! Without dedicated Slammasters like you, there would be no poetry slam!
For new Slammasters, the learning curve is a little steep. There is a lot of information you need to know, much of it is right here in this forum.
The first thing you need to do is get access to the private Slammaster's section of the forum. You do that by going to this thread and following the instructions: http://forums.poetryslam.com/index.php/topic,3491.0.html