I can´t get the value of a static var - strange

Hello,

I am new in this and I don´t understand why this is happening.

I made 2 JS and I want 2 of the values to be copied to one script, the thing is that only one of the values are copied!! and both are the same type... I don´t undestand...

On JS: Boton

 static var velocidad : float;
 static var velCambio : float;
 
 function Start () {
     velocidad = 3.0;
     velCambio = 1.0;
 }

On JS: CuboI

 var velocidad = Boton.velocidad; //speed
 var velCambio = Boton.velCambio;  //speed of image change

Please, can you explain me why only variable "velCambio" is properly copied??

Thanks