Area Protection 3.0

So as far as I can tell, area protection 3.0 is the current script.
1st question, when I set my area, I do get the meassgae about saving. So I guess it’s working.
2nd, now I stand in the area I want, I get the small white block, I click it turns red, and I build my area, large red block area. Then I hit my chat and do the save command, at that point nothing seams to happen, just sitting in my large red square. What key command is used either to activate it or even get rid or delete the red area, it seams to freeze up on me.
So in other words, what is the proper way to set your area,
Now I am a admin on a rented server, this is not a stand alone, my scripts are on the server.