Playmaker Mouse Over

I'm doing my scripting in Playmaker, but I figured somebody here might be able to help me with my problem. Here goes...

I've implemented a mouse pick event on my character so an audio clip is played when he is clicked. For some reason though, the mouse over event is not reacting consistantly.

If you are moving towards him or standing still, the mouse over event ONLY works when the mouse is on the lower half of his body. There is no reaction when moving the mouse over the upper half of his body UNLESS you are moving backwards.

I have ensured the size and positioning of the capsule collider on the character is accurate. I have tried using different colliders (capsule, cube, etc.), changing the ray distance, and everything else I could think of, but it made no difference. Does anybody have any idea of what I can do to try and fix this problem? Any help would be very much appreciated. Thank you!