[flexcoders] Variable scope

[markgoldin_2000]

I have the following form:
public class reportRunParameters extends Form
        {
                private var runString:String = "";
                private var originalRunString:String = "";
                private var mainApp:Object = new Object();
                public function reportRunParameters()
                {
                        super();
                }
                public function completeParameters():void
                {
                }

        }
in subclassed version when I try to reference runString I am getting 
an error:
1178: Attempted access of inaccessible property originalRunString 
through a reference with static type ...

Should it be public then?

Thanks