Group by problem

Hej

Har följande sql-fråga

SELECT t.CustomT3 AS Typ, 
	t.CustomA3 AS Avdelning, 
	t.OwnerSign AS Ansvarig, 
	SUM(CAST(ti.Time AS DECIMAL(28,2))) AS Timmar, 
	ISNULL(ti.Price, 0) AS Pris, 
	(SELECT Convert(char(10), MAX(StartDate), 20) FROM tblTime WHERE OwnerType = 2 AND OwnerId = 10200) AS Datum, 
	tt.Name AS Tidtyp, 
	tt.Custom1 AS FF1, 
	tt.Custom2 AS FF2 
FROM tblTime ti 
	INNER JOIN tblTask t 
		ON t.Id = ti.OwnerId and ti.OwnerType = 2
	INNER JOIN tblTimeType tt 
		ON tt.[Id] = ti.TimeTypeId 
WHERE t.Id = 10200 AND ti.Invoice = 1 
GROUP BY tt.Name, 
	tt.Custom1, 
	tt.Custom2, 
	ISNULL(ti.Price, 0), 
	t.OwnerSign, 
	t.CustomA3, 
	t.CustomT3 
ORDER BY TidTyp

Ger detta resultat:

[400] Inst. storkök	[999] Service 	LANI	1.00	0	2010-02-07	Kvalificerad låsservice	537787	
[400] Inst. storkök	[999] Service 	LANI	4.00	500	2010-02-07	Kvalificerad låsservice	537787	
[400] Inst. storkök	[999] Service 	LANI	1.00	0	2010-02-07	Lås-service	537795

Jag vill räkna samman de tidtyper som är samma, men får inte till det... :(

Så här vil jag ha resultatet:

[400] Inst. storkök	[999] Service 	LANI	5.00	0	2010-02-07	Kvalificerad låsservice	537787	
[400] Inst. storkök	[999] Service 	LANI	1.00	0	2010-02-07	Lås-service	537795

Finns det någon lösning?

MS SQL 2005

Mvh
Henrik

:)