Character moving in idle animation and not walking animation

Hi!
I have watched the following video: https://www.youtube.com/watch?v=Qzd4oU0tkVA
in order to create a character animation blueprint from scratch, since the skeleton I have imported in my side scroller is different from the mannequin.
The issue is that when my character is moving, it is moving in its idle animation and not walking.
Help would be much appreciated ;), thanks!