Problem with PRAbs

[Graunkh]

I' am pretty new to the Rpg Maker VX (though I worked with the RM2000 ages ago) and tried to get some scripts to work.
Now, there is this PRABS. I copied the scripts in to my game, but somehow it won't work.
If I start the game, the HUD won't appear and the controls of the PRABS won't work either.
I looked at the script but I couldn't find a reason why it isn't working. 

I hope someone can help me and I'm sorry for my bad english