pop in 3pdt

hello to all from argentina!!!
this is my trouble, I made a vibracaster and work wonderfull, but i have a pop in a 3pdt i put the pulldown resistors but the pop is alive, the configuration i made is this
http://www.forrestwhitesides.com/files/up/img/tut/3pdt_wiring_t.jpg
I disconnect the led and the pop still alive, can somebody help me, I really don't know what happens, sorry for my english!!! tks to all

In my (limited) experience, I've fixed popping noises by putting a pulldown resistor in the circuit, and putting a cap/resistor combo between 9v and the led+ as per this site:

http://www.muzique.com/lab/led.htm

However, I have made an EP Booster that I put pulldown resistors in as well as the little LED circuit and it still makes a terrible pop, so I'm curious to see if anyone has any other remedies? Is there such a thing as a bad 3pdt? I get mine from Tayda.

maybe the trouble is the 3pdt