I cannot find an easy way to DELETE items which are > 1 time in my table (i am working with MS SQL 2000)

Code:
  
id	serial	isOk
-------------------
2	AAA	1
3	BBB	0
5	dfds	0
6	CCC	1
7	fdfd	 0
8	AAA	0
9	CCC	0
I want to DELETE each Row IN

Code:
 

SELECT doublons.serial, Count(doublons.serial) AS  2Times
FROM doublons
GROUP BY doublons.serial
HAVING  Count(doublons.serial)>1
and WHERE isOK = 0

in my exemple , after deleting, my table must look like

Code:
 

id	serial	isOk
-------------------
8	AAA	1
9	CCC	1
3	BBB	0
5	dfds	0
7	fdfd	0
thank you for helping