Sure, you created a FsmObject variable of Texture2D type, but the plugin would not know how to save the t2d into this Playmaker variable.
That's why I am trying to see if the plugin actually produces an element in the scene, game object, asset, else, which you might point to from Playmaker.
Other than that, I'm not sure your problem can be solved. Someone who can code for well might have a clue.