SQL QUERY Error while retrieving

select  tbl_login.userid,
        tbl_login.name as Employee,
        (
        Case
            when Exists (
                        Select  *
                        from    tbl_attendance
                        where   tbl_attendance.userid=tbl_login.userid
                                and
                                tbl_attendance.firstlogin is not null
                                and
                                tbl_attendance.date='2011/03/25'
                        )
            then 'Present'
            else 'Absent'
        end
        ) as Status,
        (
        select  top 1
                coalesce(tbl_timesheet.description,null)
        from    tbl_timesheet
        where   tbl_timesheet.userid=tbl_login.userid
                and
                date='2011/03/25'
                and
                stoptime is null
        ) as Filename,
        (
        select  top 1
                coalesce(LTRIM(Right(Convert(varchar(19),tbl_timesheet.starttime,100),7)),null)
        from    tbl_timesheet
        where   tbl_timesheet.userid=tbl_login.userid
                and
                date='2011/03/25'
                and
                stoptime is null
        ) as StartTime
from    tbl_login
where   tbl_login.privilege<>'ADMIN'