controlling material parameters in blueprints

Hey I am working on trying to get this material to get a nice dissolve effect in. Everything about the material works…I have the parameters working so that I can dial the amount of dissolve but I am having trouble getting the parameter to show up in a blueprint where I can trigger it with a timeline. I have watched several tutorials about dissolving materials on youtube but they all are being implemented as an effect to make actors dissolve after being damaged enough instead of just triggering the effect on its own. Any help is greatly appreciated!

You just need something like this, and you have to type in the correct name of the parameter.

When you create your dynamic material instance, save it as a variable so you can reference it whenever you want.