You probably broke your push rod, that's that little dongle that sticks up out of the frame when the grip safety is pressed in, it lifts the firing pin safety.
Making sure the gun is empty, place a pencil in the barrel eraser side toward the chamber and dry fire the gun making sure the grip safety is all the way in, if the pencil jumps or is launched, the firing pin safety is operational. NOTE* IF YOU SLIGHTLY SHEARED THE PUSH ROD IT IS STILL POSSIBLE THAT IT MAY WORK BUT MAY NOT WORK UNLESS THE GRIP SAFETY IS PUSHED ALL THE WAY IN. So you need to do the pencil test with varying levels of pressure to see if it will still work
If you take the gun back apart, and press in the grip safety, you should be able to see the push rod rising and falling.
If the above doesn;'t work
You need to call Kimber and get a replacement part, without seeing the gun or not knowing exactly what you broke, it's hard to tell.
Your best bet is to just send the gun back in for repairs.
Here's a pic of the push rod in the up (Grip safety pressed in-deactivated) position
Here's the push rod in the down (grip safety active) position
This is why I don't like the Swartz style firing pin safety.