I have written a custom Apex Class that I am using to create a Completed Task for our inside sales people to log a call without having to enter any notes.  It works perfectly except for one small problem.  The tasks that are created are all being assigned a CreatedDate or 1/1/1900.

I tried adding objTask.CreatedDate = System.Now(); but I am getting an error that says the field is not writeable.  Is there another way to pass the datetime information to the CreatedDate field?

The full code is:

public with sharing class LogCall {

    public String AccountID;
    
    public Id TaskRecordTypeId;
    
    public LogCall() {
    
        if(ApexPages.currentPage().getParameters().get('id') != null){        
           AccountID = ApexPages.currentPage().getParameters().get('id');           
           for(RecordType rt : [SELECT ID FROM RecordType WHERE sObjectType = 'Task' AND Name = 'Log a call' Limit 1]){
              TaskRecordTypeId = rt.Id;
           }
           
        }
    }
    
    public PageReference CreateNewTask(){      
        Pagereference  pr = null;        
        try{
            
            Task objTask = new Task();
            
            objTask.CreatedDate = System.Now();
            objTask.OwnerId = Userinfo.getUserId();
            objTask.Status = 'Completed';
            objTask.Subject = 'Called and left message with person or voicemail';
            objTask.WhatId = (Id)AccountID;
            objTask.RecordTypeId = TaskRecordTypeId;
            
            insert objTask;         
            pr = new Pagereference('/' + AccountID);            
        }
        catch(Exception ex){        
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,ex.getMessage()));   
        }        
        return pr;
    }
    
}

Thanks so much,
Sean