Asign value of Attribute to static variable

Hi everybody,

I'm attaching my Script "VisibilityScript" to some GameObjects with the following Editor-Script:

 class MyPostprocessor extends AssetPostprocessor {
 
     function OnPostprocessGameObjectWithUserProperties (
         go : GameObject,
         propNames : String[],
         values : System.Object[]){
         for (var i : int = 0; i < propNames.Length; i++) {
             
             var propName : String = propNames[i];
             var value : Object = values[i];
             
             Debug.Log("Propname: " + propName + " value: " + values[i]);
             
             if(propName == "Start") {
                 go.AddComponent(VisibilityScript);
                    go.VisibilityScript.startValue = values[i];
                    Debug.Log("Start: " + VisibilityScript.startValue);
                }
                if(propName == "Ende") {
                    go.VisibilityScript.endValue = values[i];
                    Debug.Log("Ende:" + VisibilityScript.endValue);
                    
                }
         }
     }
 }

It works fine. The Script gets attached to my GameObjects during import. In the script above I set some values of 2 static variables, which I have inside my VisibilityScript. But when I hit the Play-Button, the Script seems to lose the Values of my static Variables. Their values are 0. What can I do, to store these values to my static variables inside my VisibilityScript?

Thanks for your help