Don't use round bracket around after the SET part, and you don't need square bracket around the parameters in the statement either:
UPDATE material Set [NOREG]=@NOREG, [DATE]=@DATE, [SUPPLIER]=@SUPPLIER, [NOSJL]=@NOSJL, [PO]=@PO, [STYLE]=@STYLE, [DESCRIPTION]=@descrip, [COLOR]=@COLOR, [SIZE]=@SIZE, [QTY]=@QTY, [UOM]=@UOM, [NOCSTMBN]=@NOCSTMBN WHERE [NOREG]=@NOREG