Maya Ik problem

I haven't done animation in a bit but I am trying to get a object to be able to rotate 360 following an aim point.

I tried aim constant but that gave me weird results so now I am trying a IK but I am getting the same problem I had with aim constant.


The IK follows to about 90* then it stops and if I keep moving the aim point it snaps to random weird angels. I know I learned how to stop this long ago but for the life of me I cant remember nor can I find it online.

Any help would be awesome