How do I pass a int value from one class to another with RPC?

So I'm making a game that passes the lives from one script to another but it doesnt seem to work. Here is my code snippets: Code from UIScript

 public static int life1, public static int life2 
     [RPC]
     void lifebars(int l1, int l2)
     {
         life1 = l1; 
         life2 = l2; 
         
     }

Code from class A:

 [RPC]
     void cubePosition (Vector3 pos, Vector3 rot, bool walk, 
                        bool idle, bool guard, bool kote, bool doo, bool men, bool tsuki,
                        int l1, int l2)
     {
         transform.position = pos;
         transform.eulerAngles = rot;
         PlayerAni.SetBool ("Move", walk); 
         PlayerAni.SetBool ("Idle", idle); 
         PlayerAni.SetBool ("Guard", guard); 
         PlayerAni.SetBool ("Kote", kote); //attack1 
         PlayerAni.SetBool ("Do", doo); //attack2
         PlayerAni.SetBool ("Men", men); //attack3
         PlayerAni.SetBool ("Tsuki", tsuki);//attack4
         UIScript.life1= l1; 
         UIScript.life2 = l2; 
         
         
     }

`