I would tend to agree with TX. The combination of what you put on typically is enough to quelch most shot noise from most bows. Either your bow was excessively loud to begin with or something is loose on it. The only other two options would be to install a good stabilizer (Sims Enhancer 2000 or modular, Stealth) or to shoot heavier arrows (which absorb more shot energy..ie, noise and vibration).

Hope this helps.