Hi DCM,
Clear your flash and browser caches and try again. Whenever you experience an in-game loading error such as the one you described this is always the first thing you should try. Once you've cleared your caches try equipping the new balls again.
Keep in mind that clearing your caches will reset your in-game options, so be sure to reset any preferences you have such as Flagstick Animations, Putting Grid or Graphics Quality before you tee it up again.
If this didn't solve the issue for you then please let me know.