Problem with Time attack racer tutorial

Hey guys. I was following the Time attack racer tutorial and I reached the part with setting up the checkpoints : http://docs.unrealengine.com/latest/INT/Videos/PLZlv_N0_O1gYdhCvvMKGpCF6LCgBz9XeS/xYCCjotsrMg/index.html

I seem to have followed it perfectly except for the fact that I’m using my own static mesh vehicle instead of the vehicle in the video. However, I can’t seem to get the checkpoints working. When my vehicle passes through the trigger volume, the trigger box is supposed to disappear but it doesn’t. What could I be doing wrong? I have attached a picture of my checkpoint blueprint.

i got the same problem, did you solve it?