Problem executing Animation from Script

I have an animation that I want to be played only on a certain number of the streak.
The streak counter goes up and does its job well.
This is the code I use to play the animation.

public class Move2XSprite : MonoBehaviour {

Animation Move2X;

public void Start () {
Move2X = this.gameObject.GetComponent<Animation> ();
// ANIMA2X(); if I delete the diagonals the animation executes in the first frame of the game.
}
public void Anima2X() {
Move2X.Play ("Moving2X");
}
}

To bring the function Anima2X to another script I did it this way.


GameObject M2XS;
....
....
M2XS = GameObject.Find ("Move2XSprite"); (this its on void Start)
...
...
void Sprite2X(){
M2XS.GetComponent<Move2XSprite>().Anima2X(); (I make the function for execute the Anima2X )
multiplier=2;
}
.....

I tried to execute de function and I can't do it
If I try execute from here....
public void AddStreak(){
streak++;
if (streak >= 80)
multiplier = 8;
else if (streak >= 40)
multiplier = 4;
else if (streak >= 30)
multiplier = 3;
else if (streak >= 20)
multiplier = 2;
else if (streak = 20)
Sprite2X ();
else
multiplier = 1;
UpdateGUI ();
}
The error its "CS0029; cannot implicitly convert type int to bool"
And if I try to execute Sprite2X (); from void start this its the error

NullReferenceExeption: Object reference not sweet to an instance of an object.
NameOfTheScriptWhereITryToExecute.Sprite2X()

Help?
I'm very newbie, and I do not know what to do anymore

The sprite its on legacy...
I tried to make Anima2X a Public static void...
doesn't works