Using Cursor

Using SQL2005. I need to create a cursor to update a field in a table with current date by Invoice Number. I get an endless loop and record is not updated. Where did I go wrong. David

DECLARE

@GRGR_ID CHAR(10),
@SBSB_ID CHAR(10),
@INVOICE_DUE_DATE DATETIME,
@INVOICE_TOTAL_AMOUNT_DUE MONEY,
@INVOICE_NUMBER CHAR(12),
@PASS1_GENERATION_DATE DATETIME,
@PASS1_TOTAL_AMOUNT_DUE MONEY,
@PASS1_END_OF_GRACE DATETIME



DECLARE DEQ CURSOR FOR
SELECT
GRGR_ID,
SBSB_ID,
INVOICE_DUE_DATE,
INVOICE_TOTAL_AMOUNT_DUE,
INVOICE_NUMBER,
PASS1_GENERATION_DATE,
PASS1_TOTAL_AMOUNT_DUE,
PASS1_END_OF_GRACE

FROM dbo.RPT_DELINQUENCY_TEST WHERE INVOICE_NUMBER = '080710019183'

OPEN DEQ

FETCH DEQ INTO
@GRGR_ID,
@SBSB_ID,
@INVOICE_DUE_DATE,
@INVOICE_TOTAL_AMOUNT_DUE,
@INVOICE_NUMBER,
@PASS1_GENERATION_DATE,
@PASS1_TOTAL_AMOUNT_DUE,
@PASS1_END_OF_GRACE

WHILE @@FETCH_STATUS = 0
BEGIN

UPDATE dbo.RPT_DELINQUENCY_TEST SET @PASS1_GENERATION_DATE = GETDATE()
WHERE SBSB_ID=@SBSB_ID AND GRGR_ID=@GRGR_ID AND INVOICE_NUMBER=@INVOICE_NUMBER

END

CLOSE DEQ
DEALLOCATE DEQ

Thank for your help.