DB2 SQL - Dense Rank Grouping of two feilds ordered by Datetime

DB2 SQL - Dense Rank Grouping of two feilds ordered by Datetime

I know this is a problem others must have solved in the past, but in my
limited knowledge, have yet to get over the hump. I have data which is
ordered by datetime, which needs to be grouped by a combination of two
fields (status and queue). In instances where the status and queue are the
same within a given time frame, they should be considered part of the same
group, and thus have the same id.
To accomplish this, I've attempted to implement DENSE_RANK(), and for all
intents and purposes, it has been successful - with exception of the
ordering of the groups. Below is an example:
WITH TEMP1 (EVENT_DATE, PRV_EVENT_DATE, STATUS, PRV_STATUS, QUEUE,
PRV_QUEUE) AS
(VALUES ('2012-09-04 11:40:19.936141', '', 'CREATED', '', 'SYSTEM', '')
,('2012-09-04 11:40:21.207140', '2012-09-04 11:40:19.936141',
'CREATED', 'CREATED', 'SYSTEM', 'SYSTEM')
,('2012-09-04 11:40:27.771140', '2012-09-04 11:40:21.207140',
'PROCESS', 'CREATED', 'PROCESS', 'SYSTEM')
,('2012-09-05 00:01:20.384180', '2012-09-04 11:40:27.771140',
'SUSPEND', 'PROCESS', 'SYSTEM', 'SYSTEM')
,('2012-09-05 00:02:14.042180', '2012-09-05 00:01:20.384180',
'SUSPEND', 'SUSPEND', 'PEND', 'SYSTEM')
,('2012-09-06 00:02:14.642180', '2012-09-05 00:02:14.042180',
'SUSPEND', 'SUSPEND', 'SYSTEM', 'SYSTEM')
,('2012-09-06 00:02:33.433180', '2012-09-06 00:02:14.642180',
'SUSPEND', 'SUSPEND', 'SYSTEM', 'SYSTEM')
)
SELECT
ROW_NUMBER() OVER (ORDER BY EVENT_DATE) AS "RN",
DENSE_RANK() OVER ( ORDER BY status, queue, date(event_date)) AS "GRP",
EVENT_DATE, PRV_EVENT_DATE, STATUS, PRV_STATUS, QUEUE, PRV_QUEUE
FROM TEMP1
ORDER BY EVENT_DATE
The results are such: RN GRP EVENT_DATE PRV_EVENT_DATE STATUS PRV_STATUS
QUEUE 1 1 2012-09-04 11:40:19.936141 CREATED SYSTEM 2 1 2012-09-04
11:40:21.207140 2012-09-04 11:40:19.936141 CREATED CREATED SYSTEM 3 2
2012-09-04 11:40:27.771140 2012-09-04 11:40:21.207140 PROCESS CREATED
PROCESS 4 4 2012-09-05 00:01:20.384180 2012-09-04 11:40:27.771140 SUSPEND
PROCESS SYSTEM 5 3 2012-09-05 00:02:14.042180 2012-09-05 00:01:20.384180
SUSPEND SUSPEND PEND 6 5 2012-09-06 00:02:14.642180 2012-09-05
00:02:14.042180 SUSPEND SUSPEND SYSTEM
As you can tell, the "GRP" is out of order (and I also know using
date(EVENT_DATE) isn't the solution). Any assistance would be greatly
appreciated.