You haven't provided enough information for anyone to help.
Maybe try taking some screenshots of your States and Actions, or at least detail out their sequence here.
You said the event sends, but what happens where it is sending it to? It uses a vector from the stick input? Have checked to see what the vector actually is? Maybe something is making it so tiny you can't see the movement. Compare it to the vector you get from the D pad input.
Another thing comes to mind though; it often works well to have input and the result all in the same State. For example if you push forward to move forward, don't have an action that only looks for the input (and nothing else) and then goes to a different state that only applies the movement; instead have the actions all together and working Every Frame. This doesn't work for everything (for example you can't control shooting like this), but for moving I think it makes more sense in most cases.