SAP B1 is giving incorrect syntax near 'SUM'

Hi,

This script is working until I added @CustomerCode.  What is the syntax error?

Thanks,

Noel

DECLARE @Start INT

DECLARE @End INT 

DECLARE @CustomerCode nVarChar(15)

SELECT @Start = TF.[Year] FROM OACP TF WHERE TF.[Year] = [%0]

SELECT @End = TF.[Year] FROM OACP TF WHERE TF.[Year] = [%1]

SELECT @CustomerCode = TC.[CardCode] FROM OCRD TC WHERE TC.[CardCode] = [%2]

SELECT T0.CardCode

  ,T0.CardName

  ,T0.ItemCode

  ,T1.ItemName

  ,T0.Year

  ,SUM(T0.Jan) AS Jan

  ,SUM(T0.Feb) AS Feb

  ,SUM(T0.Mar) AS Mar

  ,SUM(T0.Apr) AS Apr

  ,SUM(T0.May) AS May

  ,SUM(T0.Jun) AS Jun

  ,SUM(T0.Jul) AS Jul

  ,SUM(T0.Aug) AS Aug

  ,SUM(T0.Sep) AS Sep

  ,SUM(T0.Oct) AS Oct

  ,SUM(T0.Nov) AS Nov

  ,SUM(T0.Dec) AS Dec

FROM TWC_FGMonthlySales T0

INNER JOIN OITM T1 ON T1.ItemCode = T0.ItemCode

WHERE (T0.Year = @Start

  OR T0.Year = @End)

  AND T0.CardCode = @CustomerCode

GROUP BY T0.CardCode

  ,T0.CardName

  ,T0.ItemCode

  , T1.ItemName

  , T0.Year

ORDER BY T0.CardCode

  ,T0.ItemCode

  ,T0.Year Desc