Field visible on Standard Detail Page but not on Visuallforcepage

I have implemented following code for both standard as well as custom controller

Standard controller
<apex:page standardController="Account">
  <apex:outputField value="{!Account.Prior_Email__c}"/><br/>
</apex:page>
To run this pass id in url e.g  /apex/TestAcc?id=0019000001oBT31

Custom Controller
<apex:page action="{!load}" Controller="AccPrevious">
  <apex:outputText value="{!objAcc.Prior_Email__c}"/><br/>
</apex:page>
public class AccPrevious{
    public Account objAcc{get;set;}
    public void load(){
        objAcc=[select Prior_Email__c from Account where Name=:'test' limit 1];
    }
}