Problem Adding Variables

I am trying to wrtite a qurey that will return multiple rows as one varchar(8000). But I am howing issues when trying to add two varchar(8000) variables together. During the loop through the cursor it will just stop adding the two varchar(8000) variables together. Depending on which record that I run the query against it will stop at different point. I have run sql traces and can see that it does finish looping through the cursor completely.

I am currently just testing this and it will be placed into a stored procedure to be call from with an application later.

Any help is appreciated.



declare @ticketnum as int, @mystring as varchar(8000), @myreturn as varchar(8000)

set @ticketnum = 2
set @myreturn = ''

declare details cursor for
select convert(char(25), [Date]) +
convert(varchar(255), [Description]) +
char(9) +
[Login ID] +
isnull(char(10) +
char(9) +
replace(convert(varchar(500), [Note]), char(10), char(10) + char(9)), '') +
char(10)
from [_SMDBA_].[Incident Details]
where
[Incident #] = @ticketnum
order by [Sequence] asc


open details

FETCH NEXT FROM details
INTO @mystring

WHILE @@FETCH_STATUS = 0
BEGIN
set @myreturn = @myreturn + @mystring
FETCH NEXT FROM details
INTO @mystring

end

CLOSE details
DEALLOCATE details

select @myreturn


Example of what the query returns.
Jul 16 2003 1:54PM Opened CallMAGIC
I want to
see multiple lines
Jul 16 2003 1:54PM Call Taken By MAGICMAGIC
Jul 16 2003 1:54PM The Clock has been started MAGIC
Jan 15 2004 2:00PM User Defined Statu


What it should have returned.
Jul 16 2003 1:54PM Opened CallMAGIC
I want to
see multiple lines
Jul 16 2003 1:54PM Call Taken By MAGICMAGIC
Jul 16 2003 1:54PM The Clock has been started MAGIC
Jul 16 2003 1:54PM The Clock has been started MAGIC
Jan 15 2004 2:00PM User Defined Status Changed To CLOSEDMAGIC
Jan 15 2004 2:00PM Close Call # 1MAGIC