Hi

I did the following to accomplish this.

Controller:

 public class dataTableCon {

Set<Id> taskIds=new Set<Id>();
public List<Event> tts =new List<Event>();
public Event tt { get; set;}
Set<Id> contactIds=new Set<Id>();
List<Contact> contacts=new List<Contact>();
List<Contact> conlist=new List<Contact>();
List<Account> accounts=new List<Account>();
List<Event> tasks=new List<Event>();
public ID id1;
List<Contact> c=new List<Contact>();


public String date1;
public Date uDate;

public dataTableCon() {

}


public dataTableCon(ApexPages.StandardController controller) {
this.tt=(Event)controller.getRecord();
this.tt.ActivityDate=System.Today();
date1 = ApexPages.currentPage().getParameters().get('dd');

}


/*Task*/
public List<Event> getTasks(){
uDate=date.valueOf(date1);

Event[] ee=[select whoId from Event where (ActivityDate =: uDate AND ownerId=:UserInfo.getUserId()) ORDER BY StartDateTime ASC limit 10];
// ee.sort();
System.debug('## Tasks: ' + ee);
for(Event e:ee){
if(e.whoId!=null){
Event con=[select StartDateTime,EndDateTime,who.FirstName, Who.LastName, who.Type, Subject, Description, ActivityDate from Event where id =:e.id];
Contact cc=[select Name, Account.Premiumaccount__c,Account.Name, Street__c,City__c,PostalCode__c from Contact where ID =:e.whoId];
con.AccType__c=cc.Account.Premiumaccount__c;
con.ContactLeadAdd1__c=cc.Street__c;
con.ContactLeadAdd2__c=cc.City__c;
con.ContactLeadAdd3__c=cc.PostalCode__c;
con.AccName__c=cc.Account.Name;
tasks.add(con);
}
}
// tasks.sort();
return tasks;
}






Public PageReference Sub(){
PageReference pf=new PageReference('/apex/TaskFinalRes?dd='+tt.ActivityDate);
pf.setRedirect(True);
return pf;
}

Public PageReference Taskfin(){
PageReference pf=new PageReference('/apex/TaskFinal');
pf.setRedirect(True);
return pf;
}

}

I displayed the informations in VF page. This is working good in sandbox but the Account Name, Account Type and Address are not displaying in production.

Can any  one help in this?? This is very urgent..