Why is an OverlapEvent not working on 4.1?

Blueprint: http://puu.sh/8pRVq.jpg

Game: http://puu.sh/8pRZl.jpg
:C
on 4.0 working

I had a similar issue when i upgraded to 4.1. Turns out there was a bug in overlap actors that is now fixed.
Overlap actors is for triggers and such and do not actually block actors.
You want to use EventHit or OnActorHit instead. ( There is also one for components I believe as well )

Hi ga2mer,
We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.
Thank you.

I make collision for mesh and make overlap box in BP, it works