How to change smoothly a 3d scale

I was trying to make a character grow smothly by using a lince trace. But when the line trace hit the actor, it changes the scale, but not smoothly. It just grows in less than a milisecond. I used a Vinterp to node to do the smoothing but i think my set up is not correct and thats why it is not working properly. I post the node setup

The Pressed output of the mouse event executes just once when you press the mouse button. The interpolation node requires continuous execution to smoothly interpolate per frame. You can test this by changing the left mouse button event for an InputAxis event. To do so you add an axis input mapping of the left mouse button i n the project settings. Input axis events execute every frame.

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