Ah, I see your problem: its your ALL CAPS!!!! we really dont get back to you any faster with ALL CAPS IN YOUR TITLE. I PROMISE. Your post is written nicely so you know where that button is...
*edit* He posted 3 questions in this forum with all caps for titles. That's what I was harassing him for. I know machines only accept caps for code and comments.
on a more serious note the feed looks kinda high. 13ipm in a .008 rad is only going to be cutting the rad for a fraction of a second with nearly full cutter engagement. try slowing down your feed just for the rads. Also I dont see your RPMs. Chatter is almost always either feed or speed. If you have changed those around then maybe a different tool? How many flutes does your tool have? maybe try a 2, 3, or 4 flute tool, whichever you're not using currently.
CNC Product Manager / Training Consultant