Function Using Comparing Dates Not Working Right

Hi,

I'm trying to write a function to return all notes with date. Sample data for 1 record=187189 as follows:
iincidentid,iWorkNoteId,iSeqnum, dtEntryDate, workNoteAll
1871893440 1 2006-04-24 note1
1871893545 1 2006-06-22 note2
1871893547 1 2006-06-22 note3
1871893653 1 2006-08-10 note4
1871893653 2 2006-08-10 note5

funtion will return = 2006_08-10 note4 note5 for iincidentid=187189
-----------------------------------------------------
CREATE FUNCTION dbo.getIncidentNotesRev(@iIncidentID int)
RETURNS varchar(8000)
AS
BEGIN
declare @incidentId int
declare @worknoteid int
declare @worknotesaveid int
declare @seqnum int
declare @dtEntryDate smalldatetime
declare @worknoteall varchar(8000)
declare@allnotes varchar(8000)
declare @currentWEDate smalldatetime
declare @beginWEDate smalldatetime

select @allnotes=''
select @currentWEDate=currentweekEndDate from csCurrentweekEndDate --get the current week end date
select @beginWEDate = DATEADD(d, - 28, @currentWEDate)--get the last 4 weeks

declare CursorIncident CURSOR
LOCAL FOR SELECT iIncidentId, iWorkNoteID, iSeqNum, dtEntryDate,worknoteall FROM dbo.rpt_weekly_prospect_status_vw
where iIncidentId=@iIncidentID order by iWorkNoteId

OPEN CursorIncident
FETCH NEXT FROM CursorIncident INTO @incidentId,@worknoteid,@seqnum,@dtEntryDate,@work noteall

--store 1st record of cursor
select @worknotesaveid =@worknoteid
WHILE (@@FETCH_STATUS=0)
BEGIN
if @dtEntryDate >=@beginWEDate AND @dtEntryDate <= @currentWEDate
Begin
if @worknotesaveid <> @worknoteid
Begin
Select @allnotes = @allnotes + @dtEntryDate + @worknoteall
End
else
BEgin
select @allnotes = @allnotes + @worknoteall
End

select @worknotesaveid = @worknoteid --save next worknoteId
End
else
Begin
select @allnotes=''
End
FETCH NEXT FROM CursorIncident INTO @incidentId,@worknoteid,@seqnum,@dtEntryDate,@work noteall
END --WHILE (@@FETCH_STATUS=0)

CLOSE CursorIncident
DEALLOCATE CursorIncident

return @allnotes
END

----------
Function not working right. I appreciate any help.
Thanks in advance.