A_RotateSpikeBall problem

Today I've tried doing a SOC with A_RotateSpikeBall, but however, after the first state (which is 100 tics) it disappears from the map, anything I'm doing wrong?

here's the link to the soc, All frames are with A_RotateSpikeBall, and First frame is A_FindTarget (which finds object 0 - Player)

EDIT: The object MAPTHING is 4016

There's your problem. Without a sprite, you won't see anything.

I'm pretty sure I put an sprite here. (Which I remember it was chaos emerald)

No you didn't. It reads "-1" for all states except the first one.