issue with "Order by" clause

I am executing below query

declare @date datetime
set @date='28-Jun-2013'
SELECT  [TableName] ,[ColumnName],[RecordId],[ReasonDesc]  
FROM [DataValidation]
where CreateDate >= @date
and CreateDate < (@date+1)
Except
SELECT  [TableName] ,[ColumnName],[RecordId],[ReasonDesc]
FROM [DataValidation]
where CreateDate between '20-Jun-2013' and @date
order by 4

It is taking more than 5 min but if I remove "Order by" clause then it took only one second. Below is execution plan without order by clause -

Why this is happening? how should I get rid of this?

Thanks in advance