Class Blueprint doesn't work in level

I made a blueprint exactly the same in Blueprint Quickshot 2
The first part,where the actor blows itself,functioned well.
So I kept on to make the second part,where destroying the actor makes my character really fast.
But after I compiled the blueprint and headed back to the level and overlap the actor I put in before,the speed remained the same.
Here is my blueprint


Looking at the video, I noticed a difference between your blueprint and the blueprint shown in the video. Try replacing OnComponentBeginOverlap with Event Actor Begin Overlap, as shown in the screenshot below.

Have a great day,

Sean Flint

My apology for not checking answers for days.
And I’ve solved this problem.It’s only caused by the Max Walk Speed I typed in.It was too small.
And really thank you for answering.
And apologize again.