Adding keys to a static Dictionary doesn't keep the values at the end of the function

Hi,

well I use static variables because it isn't destroyed at the end of the function... So, I have that code:

 public class mInput {
     
     public static Dictionary<string, KeyCode> inputMap;
 
     public static void LoadAllKeysFromConfig() {
 
         inputMap = new Dictionary<string, KeyCode>();
 
         inputMap.Add("Exp", GetKeyFromString("L"));
 
         inputMap.Add("Kill", GetKeyFromString("K"));
 
         inputMap.Add("FPS", GetKeyFromString("F10"));
 
         inputMap.Add("EnableGUI", GetKeyFromString("F1"));
 
         inputMap.Add("GameMenu", GetKeyFromString("Escape"));
 
         inputMap.Add("Inv", GetKeyFromString("E"));
 
         inputMap.Add("Waypoint", GetKeyFromString("P"));
 
         inputMap.Add("ToggleMap", GetKeyFromString("M"));
 
         inputMap.Add("SwitchView", GetKeyFromString("V"));
 
         inputMap.Add("TakeScreenShot", GetKeyFromString("F2"));
 
         inputMap.Add("Laser", GetKeyFromString("L"));
 
         inputMap.Add("FlashLight", GetKeyFromString("F"));
 
         inputMap.Add("Reload", GetKeyFromString("R"));
 
         inputMap.Add("Console", GetKeyFromString("F12"));
 
         inputMap.Add("SendCommand", GetKeyFromString("Return"));
 
         inputMap.Add("Unlock", GetKeyFromString("U"));
 
     }

     private static KeyCode GetKeyFromString(string KeyStr, bool IgnoreCase = true) {
         return (KeyCode)System.Enum.Parse(typeof(KeyCode), KeyStr, IgnoreCase);
     }
 
 }

(I call LoadAllKeysFromConfig() from a Start() function from another script)

But when I want to request some control, NullReferenceException appears, why?

Thanks in advance. Bye.